Venalstonine and dioxokopsan derivatives from Kopsia fruticosa.
Two new venalstonine derivatives, viz., venacarpines A and B, and one new dioxokopsan derivative, kopsorinine, in addition to the kopsifolines A-F, and 11 other known alkaloids, were isolated from a Malayan Kopsia species. The structures of the new alkaloids were determined using NMR and MS analysis.
Kam
Toh-Seok
TS
Department of Chemistry, University of Malaya, Pantai Valley, 50603 Kuala Lumpur, Malaysia. tskam@um.edu.my
Choo
Yeun-Mun
YM
D000470:Alkaloids / Q000737:chemistry / Q000302:isolation & purification*; D031051:Alstonia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008296:Malaysia; D013058:Mass Spectrometry; D015394:Molecular Structure; D009904:Optical Rotation; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry
D000470:Alkaloids; D010936:Plant Extracts