Pyranocoumarins as chemotaxonomic markers in Eriostemon coccineus and Philotheca citrina

摘要: Abstract Examination of the aerial parts Eriostemon coccineus and Philotheca citrina has shown both to contain unusual pyranocoumarins avicennol, avicennin cis -avicennol. Three minor coumarins isolated from P. have been identified as avicennol methyl ether, -avicennol ether ethyl ether. also yielded another pyranocoumarin, dipetalolactone, common lignan sesamin. , in addition coumarins, gave furoquinoline alkaloids maculosidine γ-fagarine two dihydrocinnanic acid derivatives, eriostoic a new compound with substitution pattern comparable -avicennin which assigned trivial name -avicennic acid. The co-occurrence these rare supports contention that is closely allied certain taxa currently placed sect. Nigrostipulae.