Chemical studies on the constituents of Phyllanthus urinaria L
Yao, Q.Q.; Zuo, C.X.
Yao Xue Xue Bao 28(11): 829-835
1993
ISSN/ISBN: 0513-4870 PMID: 8009999 Document Number: 410957
Two new phenolic compounds (crystal VI and crystal IX) have been isolated from Phyllanthus urinaria L. (Euphorbiaceae). Their structures were determined by analysis of their UV, IR, 1H-NMR, 1H-1H COSY, 13C-1H COSY, long range 13C-1H COSY, DEPT, EIMS and HREIMS spectral data. Crystal VI was determined as methyl brevifolincarboxylate. Crystal IX was elucidated as trimethyl ester dehydrochebulic acid. All of the signals of the 13C-NMR of these two new compounds have been assigned mainly according to DEPT, 13C-1H COSY and long range 13C-1H COSY. Accompanying these two new compounds, 8 known compounds have been isolated. By using chemical reactions, UV, IR, 1H-NMR, MS, their structures were elucidated as n-octadecane (I), beta-sitosterol (III), ellagic acid (IV), daucosterol (V), kaempferol (VII), quercetin (VIII), gallic acid (X) and rutin (XI). Crystal II is an aldehyde, its structure elucidation is in progress.