Isolation and identification of chemical constituents from seeds of Litchi chinensis / 中草药

ABSTRACT

Objective: To study the chemical constituents from Litchi Semen. Methods: Different column chromatographic techniques were used to separate and purify the chemical constituents and their structures were elucidated by spectral analysis. Results: A total of 15 compounds were isolated and identified as 5-p-trans-coumaroylquinic acid (1), 3-O-trans- coumaroylquinic acid (2), phlorizin (3), naringin (4), rutin (5), naringenin-7-O-rutinoside (6), kaempferol 3-O-(6-O-caffeoyl)-β-D- glucopyranosyl-(1→2)-α-L-rhamnopyranosyl-7-O-α-L-rhamnopyranoside (7), proanthocyanidin A-2 (8), p-hydroxybenzoic acid (9), protocatechuic aldehyde (10), p-hydroxybenzaldehyde (11), protocatechuic acid (12), Z-p-hydroxy-cinnamic acid (13), E-p-hydroxy-cinnamic acid (14), and 3,6-dihydroxy-5,11-epoxy-7Z-megastigmaen-9-one (15). Conclusion: Compounds 1, 2, 7, 13-15 are isolated from the genus Litchi for the first time, and they are also isolated from this plant for the first time.