P C Zhang1, S X Xu. 1. Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China. pczhang@imm.ac.cn
Abstract
AIM: To study the chemical constituents in the leaves of Crataegus pinnatifida Bge. var. major N.E.Br.. METHODS: Compounds were isolated by using porous resin, silica gel, polyamide chromatographic techniques etc. Their structures were elucidated by chemical and spectroscopic methods. RESULTS: Eight compounds were identified as pinnatifin I (1), quercetin (2), 3-O-beta-D-glucopyranosyl quercetin (3), 3-O-beta-D-galacopyranosyl quercetin (4), 3-O-beta-D-glucopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (5), 3-O-beta-D-galacopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (6), kaempferol (7), 7-O-alpha-L-rhamnosyl-3-O-beta-D- glucopyranosyl kaempferol (8). CONCLUSION: Compound 1 is a new compound. Compound 8 was isolated from this plant for the first time.
AIM: To study the chemical constituents in the leaves of Crataegus pinnatifida Bge. var. major N.E.Br.. METHODS: Compounds were isolated by using porous resin, silica gel, polyamide chromatographic techniques etc. Their structures were elucidated by chemical and spectroscopic methods. RESULTS: Eight compounds were identified as pinnatifin I (1), quercetin (2), 3-O-beta-D-glucopyranosyl quercetin (3), 3-O-beta-D-galacopyranosyl quercetin (4), 3-O-beta-D-glucopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (5), 3-O-beta-D-galacopyranosyl (6-->1)-alpha-L-rhamnosyl quercetin (6), kaempferol (7), 7-O-alpha-L-rhamnosyl-3-O-beta-D- glucopyranosyl kaempferol (8). CONCLUSION: Compound 1 is a new compound. Compound 8 was isolated from this plant for the first time.