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. 2017 Mar 16;12(3):e0173714. doi: 10.1371/journal.pone.0173714

Table 1. Crystal data and structure refinement for santonin.

Identification code Santonin
Empirical formula C15H18O3
Formula weight 246.29
Temperature 100(2) K
Wavelength 0.71073 Å
Crystal system Orthorhombic
Space group P2I2I2I
Unit cell dimensions a = 6.9072(2) Å α = 90°.
b = 10.5202(3) Å β = 90°.
c = 34.5294(10) Å γ = 90°.
Volume 2509.08(13) Å3
Z 8
Density (calculated) 1.304 Mg/m3
Absorption coefficient 0.090 mm-1
F(000) 1056
Crystal size 0.270 x 0.230 x 0.230 mm3
Theta range for data collection 2.024 to 30.596°
Index ranges -9≤h≤9, -15≤h≤15, -49≤h≤49
Reflections collected 84198
Independent reflections 7686 [R(int) = 0.0210]
Completeness to theta = 25.242o 99.90%
Absorption correction Semi-empirical from equivalents
Max. and min. transmissions 0.7461 and 0.7021
Refinement method Full-matrix least-squares on F2
Data / restraints / parameters 7686 / 0 / 331
Goodness-of-fit on F2 1.021
Final R indices [I>2τ(I)] R1 = 0.0282, wR2 = 0.0796
R indices (all data) R1 = 0.0292, wR2 = 0.0805
Absolute structure parameter -0.06(9)
Largest diff. peak and hole 0.295 and -0.168 e.Å-3