Turkish Journal of Chemistry, Vol.33, No.4, 501-506, 2009
Pregnane steroids from the heartwood of Azadirachta indica
The heartwood of Azadirachta indica (Meliaceae) yielded a new steroid (2 alpha, 3 beta, 4 beta-trihydroxypregnan-16-one) and 2 known steroids (2 alpha, 3 beta, 4 beta-trihydroxypregnan-16-one and 2 alpha, 3 alpha, 4 beta-trihydroxypregnan-16-one). Their structures were elucidated through spectral studies including 2D NMR (COSY, NOESY, J-resolved, HMQC, HMBC) experiments.
Keywords:Azadirachta indica;Meliaceae;heartwood;steroids;2 alpha;3 beta;4 beta-trihydroxypregnan-16-one;2 beta;3 beta;4 beta-trihydroxypregnan-16-one;2 alpha;3 alpha;4 beta-trihydroxypregnan-16-one