title: Heteroyohimbinoid type oxindole alkaloids from Mitragyna parvifolia.
abstract: The leaves of the plant Mitragyna parvifolia have afforded two alkaloids, 16,17-dihydro-17beta-hydroxy isomitraphylline (1) and 16, 17-dihydro-17beta-hydroxy mitraphylline (2), together with two known alkaloids, isomitraphylline (3) and mitraphylline (4). The structures of 1 and 2 were elucidated using 1D and 2D NMR spectral methods, including (1)H-(1)HCOSY, DEPT, HSQC, and HMBC. Mitraphylline was the main alkaloid constituent.
authors.affiliation: Central Institute of Medicinal and Aromatic Plants, Analytical Chemistry Division Lucknow, Uttar Pradesh 226015, India.
authors.forename: Richa
authors.initials: R
authors.lastname: Pandey
authors.forename: Subhash C
authors.initials: SC
authors.lastname: Singh
authors.forename: Madan M
authors.initials: MM
authors.lastname: Gupta
mesh_terms: D026121:Indole Alkaloids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D032065:Mitragyna / Q000737:chemistry*; D015394:Molecular Structure; D000078183:Oxindoles; D018515:Plant Leaves / Q000737:chemistry
chemical_list: C516034:16, 17-dihydro-17beta-hydroxy mitraphylline; C516033:16,17-dihydro-17beta-hydroxy isomitraphylline; D026121:Indole Alkaloids; D000078183:Oxindoles; C509328:mitraphylline; C509329:isomitraphylline