title: Steroids and polyketides from Uvaria hamiltonii stem bark.
abstract: Two known steroids, stigmasterol and 6b-hydroxystigmasta-4,22-dien-3-one (1) and two unusual polyketides, cis-4-hydroxymellein (2) and trans-4-hydroxymellein (3) were isolated from the stem bark of Uvaria hamiltonii. The structures of the compounds were elucidated independently by high-resolution 2D-NMR techniques and confirmed by comparison with previously reported values.
authors.affiliation: Phytochemical Research Laboratory, Faculty of Pharmacy, University of Dhaka, Dhaka-1000, Bangladesh.
authors.forename: Kamrun Nahar
authors.initials: KN
authors.lastname: Asha
authors.forename: Rasheduzzaman
authors.initials: R
authors.lastname: Chowdhury
authors.forename: Choudhury M
authors.initials: CM
authors.lastname: Hasan
authors.forename: Mohammad A
authors.initials: MA
authors.lastname: Rashid
mesh_terms: D001459:Bangladesh; D007194:India; D018942:Macrolides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000032:analysis; D013256:Steroids / Q000737:chemistry* / Q000302:isolation & purification; D031046:Uvaria / Q000737:chemistry*
chemical_list: D018942:Macrolides; D010936:Plant Extracts; D013256:Steroids