水茄果实中的一个新木脂素苷(3)
化合物4 白色无定形粉末,ESI-MS m/z 885 [M-OH]+;1H-NMR(pyridine-d5,400 MHz)δ:6.24(1H,br s,Rha-H-1),4.67(1H,d,J=7.8 Hz,Qui-H-1),4.59(1H,dd,J=9.3,3.3 Hz,Rha-H-3),4.54(1H,dd,J=11.8,2.3 Hz,Glc-H-6),4.39(1H,m,H-16),4.34(1H,m,Glc-H-6),1.68(3H,d,J=6.2 Hz,Rha-H-6),1.59(3H,d,J=6.0 Hz,Qui-H-6),1.30(3H,d,J=6.8 Hz,H-21),1.03(3H,d,J=6.6 Hz,H-27),0.96(3H,s,H-18),0.87(3H,s,H-19),0.58(1H,s,H-9);13C-NMR(pyridine-d5 ......
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