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Acta Crystallographica Section E: Structure Reports Online logoLink to Acta Crystallographica Section E: Structure Reports Online
. 2009 Aug 29;65(Pt 9):o2275. doi: 10.1107/S1600536809033583

(1E,4E)-1,5-Bis(2,4-dimethyl­phen­yl)penta-1,4-dien-3-one

Zhiguo Feng a, Junhua Li b,*, Yi Lin a
PMCID: PMC2969860  PMID: 21577670

Abstract

In the title compound, C21H22O, a derivative of the biologically active compound curcumin, the dihedral angle between the aromatic ring planes is 20.57 (11)°.

Related literature

For backgound to cucucmin and its biological properties, see: Began et al. (1999 ▶); Gautam et al. (2007 ▶); Liang et al. (2008 ▶); Liang, Shao et al. (2009 ▶); Liang, Tian et al. (2007 ▶); Liang, Yang et al. (2007 ▶); Liang, Zhou et al. (2009 ▶); Maheshwari et al. (2006 ▶); Zhao et al. (2009 ▶).graphic file with name e-65-o2275-scheme1.jpg

Experimental

Crystal data

  • C21H22O

  • M r = 290.39

  • Monoclinic, Inline graphic

  • a = 4.9548 (7) Å

  • b = 26.555 (4) Å

  • c = 12.9632 (19) Å

  • β = 94.090 (3)°

  • V = 1701.3 (4) Å3

  • Z = 4

  • Mo Kα radiation

  • μ = 0.07 mm−1

  • T = 293 K

  • 0.42 × 0.37 × 0.26 mm

Data collection

  • Bruker SMART CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2002 ▶) T min = 0.769, T max = 1.000

  • 8842 measured reflections

  • 3128 independent reflections

  • 2007 reflections with I > 2σ(I)

  • R int = 0.095

Refinement

  • R[F 2 > 2σ(F 2)] = 0.065

  • wR(F 2) = 0.173

  • S = 0.97

  • 3128 reflections

  • 203 parameters

  • H-atom parameters constrained

  • Δρmax = 0.21 e Å−3

  • Δρmin = −0.21 e Å−3

Data collection: SMART (Bruker, 2002 ▶); cell refinement: SAINT (Bruker, 2002 ▶); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008 ▶); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008 ▶); molecular graphics: SHELXTL (Sheldrick, 2008 ▶); software used to prepare material for publication: SHELXTL.

Supplementary Material

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536809033583/hb5050sup1.cif

e-65-o2275-sup1.cif (18.8KB, cif)

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809033583/hb5050Isup2.hkl

e-65-o2275-Isup2.hkl (153.5KB, hkl)

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Acknowledgments

This work was supported by the Key Sci&Tech Project of Wenzhou Government (grant No. 2008S0629).

supplementary crystallographic information

Comment

The title compound, C21H22O, (1E,4E)-1,5-bis(2,4-dimethylphenyl)penta-1,4-dien-3-one (I), is a mono-carbonyl analogue of curcumin. Curcumin has been found to possess a variety of pharmaceutical applications, for example, inhibiting the mutations and the formation of tumors, antioxidation, anti-inflammation and anti-virus (Began et al., 1999; Maheshwari et al., 2006; Gautam et al., 2007). According to the structural disadvantages of curcumin which is considered to be responsible for its weak pharmacokinetic profiles, a series of mono-carbonyl analogues have been designed and synthesized, and their biological activity in vitro and in vivo were evaluated.

Derivatives of dibenzylidene acetone, cyclopentanone and cyclohexanone exhibit potent anti-inflammatory, antibacterial and anti-cancer activity.(Liang et al., 2008; Liang et al., 2008; Liang, Shao et al., 2009; Liang, Zhou et al., 2009). This fact leads to the significance of these synthetic mono-carbonyl analogues of curcumin. Several of these derivatives have been reported their crystal structures (Liang, Tian et al., 2007; Liang, Yang et al., 2007; Zhao et al., 2009). In the present paper, we describe the crystal structure of the title compound C21H22O (I) here. Its geometrical parameters of are normal, the dihedral angle between the six-membered aromatic ring planes is 20.57 (11)°.

Experimental

To a solution of 15 mmol 2,4-dimethylbenzaldehyde in MeOH (10 ml) was added 7.5 mmol acetone. The solution was stirred at room temperature for 20 min, followed by added dropwise 20% (w/v) NaOH (1.5 ml, 7.5 mmol). The mixture was stirred at RT and monitored with TLC. When the reaction finished, the residue was poured into saturated NH4Cl solution and filtered. The precipitate was washed and purified by chromatography over silica gel using CH2Cl2 / CH3OH as the eluent to afford the pure product (yield: 38.2%). Colourless blokcs of (I) were grown in a CH2Cl2—CH3OH mixture (6:2 v/v) by slow evaporation (mp 436–437 K). 1H-NMR (CDCl3): 2.34 (s, 6H, Ar4—CH3), 2.44 (s, 6H, Ar2—CH3), 6.96 (d, 2H, J=16.0 Hz, =CH—C=O), 7.05 (m, 4H, Ar—H3,5), 7.56 (d, 2H, J=8.0 Hz, Ar—H6), 8.0 (d, 2H, J=16.0 Hz, Ar—CH=C). ESI-MS m/z: 603.8 (2M+Na)+, calcd for C21H22O: 290.4.

Refinement

The H atoms were positioned geometrically (C—H = 0.93–0.97 Å) and refined as riding with Uiso(H) = 1.2Ueq(C) or 1.5Ueq(methyl C).

Figures

Fig. 1.

Fig. 1.

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The molecular structure of (I) shoiwng 50% displacement ellipsoids for the non-hydrogen atoms.

Crystal data

C21H22O F(000) = 624
Mr = 290.39 Dx = 1.134 Mg m−3
Monoclinic, P21/c Mo Kα radiation, λ = 0.71073 Å
Hall symbol: -P 2ybc Cell parameters from 1845 reflections
a = 4.9548 (7) Å θ = 4.4–44.1°
b = 26.555 (4) Å µ = 0.07 mm−1
c = 12.9632 (19) Å T = 293 K
β = 94.090 (3)° Prism, green
V = 1701.3 (4) Å3 0.42 × 0.37 × 0.26 mm
Z = 4
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Data collection

Bruker SMART CCD diffractometer 3128 independent reflections
Radiation source: fine-focus sealed tube 2007 reflections with I > 2σ(I)
graphite Rint = 0.095
ω scans θmax = 25.5°, θmin = 1.5°
Absorption correction: multi-scan (SADABS; Bruker, 2002) h = −5→6
Tmin = 0.769, Tmax = 1.000 k = −31→32
8842 measured reflections l = −7→15
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Refinement

Refinement on F2 Primary atom site location: structure-invariant direct methods
Least-squares matrix: full Secondary atom site location: difference Fourier map
R[F2 > 2σ(F2)] = 0.065 Hydrogen site location: inferred from neighbouring sites
wR(F2) = 0.173 H-atom parameters constrained
S = 0.97 w = 1/[σ2(Fo2) + (0.0858P)2] where P = (Fo2 + 2Fc2)/3
3128 reflections (Δ/σ)max = 0.057
203 parameters Δρmax = 0.21 e Å−3
0 restraints Δρmin = −0.21 e Å−3
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Special details

Geometry. All e.s.d.'s (except the e.s.d. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell e.s.d.'s are taken into account individually in the estimation of e.s.d.'s in distances, angles and torsion angles; correlations between e.s.d.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell e.s.d.'s is used for estimating e.s.d.'s involving l.s. planes.
Refinement. Refinement of F2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F2, conventional R-factors R are based on F, with F set to zero for negative F2. The threshold expression of F2 > σ(F2) is used only for calculating R-factors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F2 are statistically about twice as large as those based on F, and R- factors based on ALL data will be even larger.
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Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å2)

x y z Uiso*/Ueq
O1 1.4353 (4) 0.35616 (7) 0.08357 (12) 0.0700 (5)
C1 1.2047 (5) 0.36963 (8) 0.09662 (16) 0.0510 (6)
C2 1.0758 (5) 0.35782 (8) 0.19171 (16) 0.0528 (6)
H2 0.9031 0.3703 0.1994 0.063*
C3 1.1920 (4) 0.33037 (8) 0.26714 (16) 0.0479 (6)
H3 1.3621 0.3173 0.2566 0.057*
C4 1.0435 (5) 0.39838 (8) 0.01739 (16) 0.0545 (6)
H4 0.8698 0.4083 0.0313 0.065*
C5 1.1329 (5) 0.41070 (8) −0.07216 (16) 0.0516 (6)
H5 1.3019 0.3982 −0.0860 0.062*
C6 0.9942 (4) 0.44212 (7) −0.15263 (16) 0.0473 (6)
C7 1.0565 (4) 0.43873 (7) −0.25633 (16) 0.0493 (6)
C8 0.9237 (5) 0.47084 (8) −0.32771 (17) 0.0557 (6)
H8 0.9633 0.4684 −0.3966 0.067*
C9 0.7367 (5) 0.50614 (8) −0.30192 (18) 0.0570 (6)
C10 0.6759 (5) 0.50852 (9) −0.19985 (19) 0.0645 (7)
H10 0.5482 0.5316 −0.1801 0.077*
C11 0.8023 (5) 0.47709 (9) −0.12683 (18) 0.0603 (6)
H11 0.7577 0.4794 −0.0585 0.072*
C12 1.0812 (4) 0.31833 (7) 0.36552 (15) 0.0455 (5)
C13 0.8956 (5) 0.34978 (8) 0.40688 (17) 0.0564 (6)
H13 0.8429 0.3789 0.3710 0.068*
C14 0.7855 (5) 0.33986 (9) 0.49876 (18) 0.0614 (7)
H14 0.6607 0.3620 0.5239 0.074*
C15 0.8597 (5) 0.29692 (9) 0.55428 (16) 0.0544 (6)
C16 1.0474 (4) 0.26532 (9) 0.51378 (16) 0.0535 (6)
H16 1.0998 0.2365 0.5506 0.064*
C17 1.1613 (4) 0.27453 (8) 0.42090 (15) 0.0466 (5)
C18 1.2581 (5) 0.40116 (8) −0.29188 (17) 0.0626 (7)
H18A 1.2595 0.4025 −0.3658 0.094*
H18B 1.2081 0.3679 −0.2712 0.094*
H18C 1.4350 0.4091 −0.2613 0.094*
C19 0.5986 (6) 0.54084 (9) −0.3819 (2) 0.0795 (8)
H19A 0.6863 0.5383 −0.4453 0.119*
H19B 0.6098 0.5749 −0.3572 0.119*
H19C 0.4120 0.5313 −0.3938 0.119*
C20 1.3587 (5) 0.23772 (9) 0.38199 (18) 0.0640 (7)
H20A 1.3890 0.2110 0.4313 0.096*
H20B 1.5267 0.2545 0.3725 0.096*
H20C 1.2871 0.2240 0.3172 0.096*
C21 0.7377 (5) 0.28438 (12) 0.65406 (18) 0.0784 (8)
H21A 0.6361 0.3127 0.6761 0.118*
H21B 0.8792 0.2765 0.7060 0.118*
H21C 0.6198 0.2559 0.6438 0.118*
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Atomic displacement parameters (Å2)

U11 U22 U33 U12 U13 U23
O1 0.0565 (11) 0.0924 (13) 0.0619 (11) 0.0062 (9) 0.0100 (9) 0.0172 (9)
C1 0.0505 (14) 0.0541 (13) 0.0482 (13) −0.0077 (11) 0.0023 (11) 0.0032 (10)
C2 0.0491 (13) 0.0618 (14) 0.0476 (13) −0.0010 (11) 0.0044 (11) 0.0058 (11)
C3 0.0476 (13) 0.0479 (12) 0.0482 (13) −0.0034 (10) 0.0043 (10) −0.0009 (10)
C4 0.0522 (14) 0.0625 (14) 0.0492 (13) 0.0007 (11) 0.0061 (11) 0.0072 (11)
C5 0.0558 (14) 0.0491 (13) 0.0498 (13) −0.0050 (10) 0.0036 (11) −0.0002 (10)
C6 0.0546 (14) 0.0411 (11) 0.0459 (13) −0.0053 (10) 0.0016 (10) −0.0001 (9)
C7 0.0548 (13) 0.0456 (12) 0.0474 (13) −0.0087 (10) 0.0037 (11) 0.0022 (10)
C8 0.0668 (16) 0.0528 (13) 0.0474 (13) −0.0088 (12) 0.0034 (11) 0.0045 (11)
C9 0.0682 (16) 0.0427 (12) 0.0588 (15) −0.0048 (12) −0.0049 (12) 0.0009 (11)
C10 0.0678 (17) 0.0532 (14) 0.0716 (17) 0.0092 (12) −0.0008 (13) −0.0069 (13)
C11 0.0715 (17) 0.0579 (14) 0.0520 (14) −0.0001 (12) 0.0084 (12) −0.0018 (11)
C12 0.0447 (12) 0.0481 (12) 0.0435 (12) −0.0012 (10) 0.0020 (10) −0.0009 (10)
C13 0.0607 (15) 0.0549 (13) 0.0539 (14) 0.0141 (11) 0.0074 (12) 0.0058 (11)
C14 0.0598 (15) 0.0696 (16) 0.0564 (15) 0.0172 (13) 0.0156 (12) 0.0002 (12)
C15 0.0517 (14) 0.0657 (15) 0.0461 (13) 0.0025 (12) 0.0056 (11) 0.0027 (11)
C16 0.0531 (14) 0.0586 (14) 0.0487 (13) 0.0035 (11) 0.0031 (11) 0.0115 (11)
C17 0.0455 (12) 0.0462 (12) 0.0479 (13) 0.0023 (10) 0.0015 (10) 0.0012 (10)
C18 0.0700 (16) 0.0639 (15) 0.0549 (14) 0.0062 (13) 0.0110 (12) −0.0017 (12)
C19 0.095 (2) 0.0616 (16) 0.0795 (19) 0.0047 (14) −0.0140 (16) 0.0103 (14)
C20 0.0720 (17) 0.0580 (14) 0.0632 (15) 0.0108 (13) 0.0140 (13) 0.0003 (12)
C21 0.0716 (18) 0.107 (2) 0.0586 (16) 0.0085 (16) 0.0199 (13) 0.0149 (15)
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Geometric parameters (Å, °)

O1—C1 1.221 (3) C12—C17 1.409 (3)
C1—C2 1.462 (3) C13—C14 1.370 (3)
C1—C4 1.469 (3) C13—H13 0.9300
C2—C3 1.319 (3) C14—C15 1.384 (3)
C2—H2 0.9300 C14—H14 0.9300
C3—C12 1.459 (3) C15—C16 1.383 (3)
C3—H3 0.9300 C15—C21 1.504 (3)
C4—C5 1.313 (3) C16—C17 1.388 (3)
C4—H4 0.9300 C16—H16 0.9300
C5—C6 1.468 (3) C17—C20 1.496 (3)
C5—H5 0.9300 C18—H18A 0.9600
C6—C11 1.387 (3) C18—H18B 0.9600
C6—C7 1.403 (3) C18—H18C 0.9600
C7—C8 1.389 (3) C19—H19A 0.9600
C7—C18 1.507 (3) C19—H19B 0.9600
C8—C9 1.376 (3) C19—H19C 0.9600
C8—H8 0.9300 C20—H20A 0.9600
C9—C10 1.379 (3) C20—H20B 0.9600
C9—C19 1.513 (3) C20—H20C 0.9600
C10—C11 1.379 (3) C21—H21A 0.9601
C10—H10 0.9300 C21—H21B 0.9601
C11—H11 0.9300 C21—H21C 0.9601
C12—C13 1.379 (3)
O1—C1—C2 121.6 (2) C12—C13—H13 118.7
O1—C1—C4 121.5 (2) C13—C14—C15 120.2 (2)
C2—C1—C4 116.9 (2) C13—C14—H14 119.9
C3—C2—C1 123.4 (2) C15—C14—H14 119.9
C3—C2—H2 118.3 C14—C15—C16 117.6 (2)
C1—C2—H2 118.3 C14—C15—C21 121.4 (2)
C2—C3—C12 126.7 (2) C16—C15—C21 121.0 (2)
C2—C3—H3 116.6 C15—C16—C17 123.3 (2)
C12—C3—H3 116.7 C15—C16—H16 118.4
C5—C4—C1 123.1 (2) C17—C16—H16 118.4
C5—C4—H4 118.4 C16—C17—C12 118.1 (2)
C1—C4—H4 118.4 C16—C17—C20 119.59 (19)
C4—C5—C6 126.8 (2) C12—C17—C20 122.3 (2)
C4—C5—H5 116.6 C7—C18—H18A 109.5
C6—C5—H5 116.6 C7—C18—H18B 109.5
C11—C6—C7 118.4 (2) H18A—C18—H18B 109.5
C11—C6—C5 120.2 (2) C7—C18—H18C 109.5
C7—C6—C5 121.4 (2) H18A—C18—H18C 109.5
C8—C7—C6 118.2 (2) H18B—C18—H18C 109.5
C8—C7—C18 119.7 (2) C9—C19—H19A 109.5
C6—C7—C18 122.09 (19) C9—C19—H19B 109.5
C9—C8—C7 123.5 (2) H19A—C19—H19B 109.5
C9—C8—H8 118.3 C9—C19—H19C 109.5
C7—C8—H8 118.3 H19A—C19—H19C 109.5
C8—C9—C10 117.5 (2) H19B—C19—H19C 109.5
C8—C9—C19 121.9 (2) C17—C20—H20A 109.5
C10—C9—C19 120.7 (2) C17—C20—H20B 109.5
C11—C10—C9 120.8 (2) H20A—C20—H20B 109.5
C11—C10—H10 119.6 C17—C20—H20C 109.5
C9—C10—H10 119.6 H20A—C20—H20C 109.5
C10—C11—C6 121.7 (2) H20B—C20—H20C 109.5
C10—C11—H11 119.2 C15—C21—H21A 109.5
C6—C11—H11 119.1 C15—C21—H21B 109.5
C13—C12—C17 118.2 (2) H21A—C21—H21B 109.5
C13—C12—C3 120.67 (19) C15—C21—H21C 109.5
C17—C12—C3 121.08 (19) H21A—C21—H21C 109.5
C14—C13—C12 122.6 (2) H21B—C21—H21C 109.5
C14—C13—H13 118.7
O1—C1—C2—C3 −3.1 (3) C9—C10—C11—C6 0.1 (4)
C4—C1—C2—C3 176.8 (2) C7—C6—C11—C10 −0.8 (3)
C1—C2—C3—C12 177.8 (2) C5—C6—C11—C10 177.5 (2)
O1—C1—C4—C5 1.1 (4) C2—C3—C12—C13 −26.1 (3)
C2—C1—C4—C5 −178.8 (2) C2—C3—C12—C17 154.2 (2)
C1—C4—C5—C6 −175.49 (19) C17—C12—C13—C14 −0.5 (3)
C4—C5—C6—C11 24.6 (3) C3—C12—C13—C14 179.7 (2)
C4—C5—C6—C7 −157.2 (2) C12—C13—C14—C15 0.1 (4)
C11—C6—C7—C8 0.4 (3) C13—C14—C15—C16 0.4 (4)
C5—C6—C7—C8 −177.83 (18) C13—C14—C15—C21 −178.5 (2)
C11—C6—C7—C18 −178.7 (2) C14—C15—C16—C17 −0.4 (3)
C5—C6—C7—C18 3.0 (3) C21—C15—C16—C17 178.4 (2)
C6—C7—C8—C9 0.7 (3) C15—C16—C17—C12 0.1 (3)
C18—C7—C8—C9 179.9 (2) C15—C16—C17—C20 −178.8 (2)
C7—C8—C9—C10 −1.4 (3) C13—C12—C17—C16 0.4 (3)
C7—C8—C9—C19 179.3 (2) C3—C12—C17—C16 −179.83 (19)
C8—C9—C10—C11 1.0 (4) C13—C12—C17—C20 179.2 (2)
C19—C9—C10—C11 −179.7 (2) C3—C12—C17—C20 −1.0 (3)
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Footnotes

Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB5050).

References

  1. Began, G., Sudharshan, E., Sankar, K. U. & Appu, R. G. (1999). J. Agric. Food Chem.47, 4992–4997. [DOI] [PubMed]
  2. Bruker (2002). SMART, SAINT and SADABS Bruker AXS Inc., Madison, Wisconsin, USA.
  3. Gautam, S. C., Gao, X. & Dulchavsky, S. (2007). Adv. Exp. Med. Biol.595, 321–41. [DOI] [PubMed]
  4. Liang, G., Li, X. K., Chen, L., Yang, S. L., Wu, X. P., Studer, E., Gurley, E. C., Hylemon, P. B., Ye, F. Q., Li, Y. R. & Zhou, H. P. (2008). Bioorg. Med. Chem. Lett.18, 1525–1529. [DOI] [PMC free article] [PubMed]
  5. Liang, G., Shao, L. L., Wang, Y., Zhao, C. G., Chu, Y. H., Xiao, J., Zhao, Y., Li, X. K. & Yang, S. L. (2009). Bioorg. Med. Chem.17, 2623–2631. [DOI] [PubMed]
  6. Liang, G., Tian, J.-L., Zhao, C.-G. & Li, X.-K. (2007). Acta Cryst. E63, o3630.
  7. Liang, G., Yang, S.-L., Wang, X.-H., Li, Y.-R. & Li, X.-K. (2007). Acta Cryst. E63, o4118.
  8. Liang, G., Zhou, H. P., Wang, Y., Gurley, E. C., Feng, B., Chen, L., Xiao, J., Yang, S. L. & Li, X. K. (2009). J. Cell. Mol. Med. In the press. [DOI] [PMC free article] [PubMed]
  9. Liang, G., Yang, S. L., Jiang, L. J., Zhao, Y., Shao, L. L., Xiao, J., Ye, F. Q., Li, Y. R.& Li, X. K.( 2008). Chem. Pharm. Bull (Tokyo), 56, 162–167. [DOI] [PubMed]
  10. Maheshwari, R. K., Singh, A. K., Gaddipati, J. & Srimal, R. C. (2006). Life Sci.78, 2081–2087. [DOI] [PubMed]
  11. Sheldrick, G. M. (2008). Acta Cryst. A64, 112–122. [DOI] [PubMed]
  12. Zhao, C. G., Yang, J., Huang, Y., Liang, G. & Li, X. K. (2009). Z. Kristallogr. New Cryst. Struct.224, 337–338.

Associated Data

This section collects any data citations, data availability statements, or supplementary materials included in this article.

Supplementary Materials

Crystal structure: contains datablocks I, global. DOI: 10.1107/S1600536809033583/hb5050sup1.cif

e-65-o2275-sup1.cif (18.8KB, cif)

Structure factors: contains datablocks I. DOI: 10.1107/S1600536809033583/hb5050Isup2.hkl

e-65-o2275-Isup2.hkl (153.5KB, hkl)

Additional supplementary materials: crystallographic information; 3D view; checkCIF report

Articles from Acta Crystallographica Section E: Structure Reports Online are provided here courtesy of International Union of Crystallography

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