A novel diterpene, sagequinone methide A, was isolated from the ethyl acetate extract of sage, Salvia officinalis, whereas no sagequinone methide A could be detected from the methanol extract. Another novel compound, 6,7-dimethoxyrosmanol was isolated from the methanol extract.
Eleven novel cytotoxic xanthones, gambogin, morellin dimethyl acetal, isomoreollin B, moreollic acid, gambogenic acid, gambogenin, isogambogenin, desoxygambogenin, gambogenin dimethyl acetal, gambogellic acid and hanburin were isolated together with four known xanthones, gambogic acid, isomorellin, morellic acid and desoxymorellin, from the dry latex of Garcinia hanburyi. The structures were elucidated...
Novel spiro compounds, hyperolactones A-D were isolated from stems and leaves of Hypericum chinense. Hyperolactones have a common spiro-lactone structure with a 2-alkyl- or 2-aryl-9-methyl-9-vinyl-1,7-dioxaspiro [4.4] non-2-ene-4,6-dione skeleton.
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