Phenolic Compounds from the Immature Fruits of Solanum nigrum L.
Yihai Wang
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
Jingwen Xu
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
Xiangjiu He *
School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou 510006, China.
*Author to whom correspondence should be addressed.
Abstract
Solanum nigrum L. has been traditionally used as traditional Chinese medicine and food all over the world. Phytochemical investigations of the immature fruits of S. nigrum have been carried out and five coumarins (1-5) and five phenolic compounds (6-11) were obtained. Their structures were elucidated on the basis of spectroscopic and chemical methods, including IR, MS, 1H and 13C-NMR. They were identifies as 6,7-dimethoxycoumarin (1), 6-methoxy-7-hydroxycoumarin (2), 6,8-dimethoxycoumarin (3), 6,7-dimethoxycoumarin (4), umbelliferone (5), vanillin (6), vanillic acid (7), syringic aldehyde (8), isovanillic acid (9), ethyl 3,4-dihydroxybenzoate (10), and ethyl 3,4-dihydroxyphenylacetate (11).
Keywords: Solanum nigrum L, immateure fruits, chemical investigation, coumarin, phenolic compound