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. Author manuscript; available in PMC: 2015 Oct 1.
Published in final edited form as: Nat Prod Commun. 2014 Oct;9(10):1403–1406.

Table 1.

1H and 13C NMR data for compounds 1 and 2.

1 2
Posn δHb δCc δHb δCc
1 204.4 C 204.6 C
2 5.82 s 106.8 CH 5.77 brs 106.4 CH
3 185.9 C 184.4 C
4 134.5 C 131.8 C
5 4.23 s 84.5 CH 6.27 dt (2.9, 1.4) 137.3 CH
6 4.74 d (5.2) 85.1 CH 5.33 ddt (5.5, 2.9, 1.4) 81.3 CH
7 4.21 m 44.8 CH 3.80 ddd (5.5, 3.2, 2.7) 50.9 CH
8 4.31 ddd (11.8, 1.4, 1.3) 72.3 CH 4.54 dt (11.8, 2.2) 73.2 CH
9 2.52 dd (13.7, 11.8) 44.6 CH2 2.49 dd (13.9, 11.8) 43.9 CH2
2.33 dd (13.7, 1.4) 2.32 dd(13.9, 2.2)
10 90.4 C 89.8 C
11 133.9 C 133.1 C
12 169.1 C 168.6 C
13 6.21 d (3.3) 123.8 CH2 6.23 d (3.2) 124.6 CH2
5.46 d (2.9) 5.47 d (2.7)
14 1.53 s 21.2 CH3 1.54 s 20.7 CH3
15 6.00 s 127.1 CH2 4.16 ddd (12.8, 1.4, 1.3) 72.7 CH2
5.78 s 4.12 ddd (12.8,1.4, 1.3)
1' 166.9 C 166.8 C
2' 135.4 C 135.3 C
3' 5.95 m 126.4 CH2 6.01 brs 126.6 CH2
5.53 m 5.55 m
4' 1.82 s 18.0 CH3 1.83 s 18.0 CH3
5-OMe 3.73 s 57.2 CH3
15-OMe 3.40 s 58.5 CH3
a

Assignments based on analysis of 2D NMR spectra.

b

Data (δ) measured at 500 MHz; s= singlet, br s=broad singlet, d=doublet, dd=doublet of doublets, ddd=doublet of doublets of doublets, dt=doublet of triplets, m=multiplet. J values are in Hz and are omitted if the signals overlapped as multiplets. The overlapped signals were assigned from HSQC and HMBC spectra without designating multiplicity.

c

Data (δ) measured at 125 MHz; CH3, CH2, CH, and C multiplicities were determined by HSQC experiment.