Chemical Constituents of the n-butanol Extracts from the Aerial Parts of Baeckea Frutescents
The chemical constituents of the n-butanol extracts from the aerial parts of Baeckea frutes-cents were investigated. Twelve compounds were separated and identified by spectroscopic analysis as:quercetin (1), myricetin (2), quercetin 3-O-α-L-rhamnopyranoside (3), myricetin 3-O-α-L-rhamnopyra-noside (4), quercetin 3-O-α-L-arabinofuranoside (5), quercetin 3-O-β-D-xylopyranoside (6), quercetin 3-O-α-L-arabinopyranoside (7), quercetin 4′-O-β-D-glucopyranoside (8), kaempferol 3-O-α-L-arabinofura-noside (9), kaempferol 3-O-α-L-rhamnopyranoside (10), myricetin 3-O-(2′′-O-galloyl)-α-L-rhamnopyra-noside (11) and myricetin 3-O-(3′′-O-galloyl)-α-L-rhamnopyranoside (12). Compounds 5-12 were isolated from this plant for the first time.
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