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Stemocurtisine, the first pyrido[1,2-a]azapine Stemona alkaloid
Pitchaya Mungkornasawakul1, Stephen G Pyne, Araya Jatisatienr
1Division of Environmental Sciences, Chiang Mai University, Chiang Mai 50202, Thailand.
Journal of Natural Products
|July 26, 2003
Abstract:
A new pentacyclic stemona alkaloid, stemocurtisine (2), with a novel pyrido[1,2-a]azapine A,B-ring system, has been isolated from a root extract of Stemona curtisii. The structure and relative stereochemistry was determined by spectral data interpretation and X-ray crystallography.