title: Roxburghiadiol A and roxburghiadiol B, two 14 alpha-methylsterols from Aglaia roxburghiana.
abstract: Two new 14 alpha-methylsterols, roxburghiadiol A and roxburghiadiol B, were isolated from the leaves and fruits of Aglaia roxburghiana. Previously their structures were tentatively assigned as 4-bisnormethyl-24-methylene-cycloarta-3 beta, 7 alpha-diol and 4-bisnormethyl-24-methylene-cycloarta-3 beta, 6 alpha-diol, respectively. A reinvestigation using 2D-nmr technique has confirmed the structure 2 for roxburghiadiol B as previously reported, and roxburghiadiol A is now found to be the corresponding 6 beta epimer 1.
authors.affiliation: Captain Srinivasa Murti Drug Research Institute for Ayurveda, Madras, India.
authors.forename: K
authors.initials: K
authors.lastname: Balakrishna
authors.forename: A B
authors.initials: AB
authors.lastname: Kundu
authors.forename: A
authors.initials: A
authors.lastname: Patra
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D008515:Medicine, Ayurvedic; D015394:Molecular Structure; D010840:Phytosterols / Q000302:isolation & purification*; D010946:Plants, Medicinal / Q000032:analysis*
chemical_list: D010840:Phytosterols; C064688:roxburghiadiol A