Abstract
Chromatography on silica gel columns isolated ten crystalline solids from expressed West Indian lime ( Citrus aurantifolia) oil. Of the eight compounds identified, three were those previously reported by Caldwell and Jones, i.e. 5-geranoxy-7-methoxycoumarin, 5,7-dimethoxycoumarin and 5,8-dimethoxypsoralen (isopimpinellin). The following new compounds were identified: 5-geranoxypsoralen (bergamottin), 5-γ,γ-dimethylallyloxypsoralen (isoimperatorin), 8-geranoxypsoralen, 8-γ,γ-dimethylallyloxypsoralen (imperatorin); and 5-methoxy-8-γ,γ-dimethylallyloxypsoralen (phellopterin). Two compounds were tentatively identified as 5-geranoxy-8-methoxypsoralen and oxypeucedanin hydrate.
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