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Table 1 1H and 13C NMR data of compounds 1 and 2 in CDCl3

From: Inhibition of IKK-β by epidioxysterols from the flowers of Calotropis gigantea (Niu jiao gua)

Position 1 2
δ C δ H (J in Hz) δ C δ H (J in Hz)
1 32.6   34.7  
2 30.6   29.6  
3 66.3 4.01 (m) 66.1 3.86 (m)
4 36.0   36.7  
5 82.7   82.3  
6 135.4 6.28 (d, 8.4) 135.2 6.19 (d, 8.4)
7 130.7 6.59 (d, 8.4) 130.6 6.45 (d, 8.4)
8 78.4   79.6  
9 142.5   51.0  
10 38.0   36.9  
11 119.7 5.42 (dd, 6.0, 1.8) 23.3  
12 41.2   39.3  
13 43.6   44.5  
14 48.2   51.6  
15 20.9   20.5  
16 28.6   28.6  
17 55.8   56.1  
18 13.0 0.73 (s) 12.8 0.76 (brs)
19 25.6 1.09 (s) 18.1 0.83 (brs)
20 39.9   39.7  
21 20.7 1.00 (d, 6.6) 20.8 0.94 (d, 6.6)
22 135.1 5.16 (dd, 15.0, 8.4) 135.5 5.09 (dd, 15.0, 8.4)
23 132.4 5.24 (dd, 15.0, 7.8) 132.3 5.17 (dd, 15.0, 7.8)
24 42.8   42.7  
25 33.1   33.0  
26 19.9 0.83 (d, 6.6) 19.6 0.76 (d, 6.6)
27 19.6 0.82 (d, 7.2) 19.9 0.78 (d, 6.6)
28 17.6 0.91 (d, 7.2) 17.5 0.86 (d, 6.6)