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[Chemical constituents from Aeschynanthus longicaullis].

Lin Chen, Wenyi Kang

Abstract

OBJECTIVE: To study the chemical constituents from Aeschynanthus longicaullis. METHOD: The column chromatographic techniques were applied to isolate the constituents. The spectroscopie methods were used of EI-MS and NMR to identify the structures of the separated compounds. RESULT: Seven compounds were isolated from the ethyl acetate extract of A. longicaullis, whose structures were elucidated as cryptomeridiol (1), 4 (15) -eudesmene-1beta, 6alpha-diol (2), 2,5-bornanediol (3), isovanillic acid (4), vanillic acid (5), stigmast-5 (6) , 22 (23)-diene-3beta-ol (6) and beta-sitosterol (7). CONCLUSION: Compounds 1-5 were isolated for the first time from Gesneriaceae and 6-7 were isolated for the first time from this plant.

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Key concepts: Gesneriaceae, Vanillic acid, Chemical constituents, Chemistry, Chromatography, Ethyl acetate, Column chromatography, Organic chemistry