Table 1: Comparison of 1H and 13C NMR of mesuagenin C and compound 3 (δ in ppm; 400 MHz in CDCl3).

Positionδ H, (Hz) mesuagenin C [8]δ H, (Hz) compound 3δ C mesuagenin C [8]δ C compound 3

2158.9158.9
36.00 (1H, ) 6.01 (1H, )
4157.2157.3
4a100.7100.7
5-OH5.98 (1H, s, 5-OH) 5.99 (1H, s, 5-OH)
6112.6112.6
7-OH14.54 (1H, s, 7-OH) 14.54 (1H, s, 7-OH)
8103.8103.8
8a155.8155.8
1137.1137.1
27.40 (1H, , Ar)7.42 (1H, , Ar)
3 7.52 (3H, , Ar) 7.54 (3H, , Ar)
4
5
67.40 (1H, , Ar)7.42 (1H, , Ar)
1′′3.30 (2H, , )3.31 (2H, , )
2′′5.08 (1H, , )5.10 (1H, , )
3′′138.2138.1
4′′1.68 (3H, )1.70 (3H, )
5′′ 2.03–1.91 (4H, ) 2.04–1.92 (4H, )
6′′
7′′4.99 (1H, , )5.00 (1H, , )
8′′131.7131.7
9′′1.53 (3H, )1.54 (3H, )
10′′1.59 (3H, )1.60 (3H, )
1′′′210.7210.8
2′′′4.11 (1H, )4.12 (1H, )
3′′′ 1.28 (6H, , ) 1.29 (6H, , )
4′′′