title: New indole alkaloids from Alstonia macrophylla.
abstract: Ten new indole alkaloids, alstomaline (1), 10,11-dimethoxynareline (2), alstohentine (3), alstomicine (4), 16-hydroxyalstonisine (5), 16-hydroxyalstonal (6), 16-hydroxy-N(4)-demethylalstophyllal oxindole (7), alstophyllal (8), 6-oxoalstophylline (9), and 6-oxoalstophyllal (10), in addition to 21 other known ones, were obtained from the leaf extract of the Malayan Alstonia macrophylla. The structures were determined using NMR and MS analysis.
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia. tskam@um.edu.my
authors.forename: Toh-Seok
authors.initials: TS
authors.lastname: Kam
authors.forename: Yeun-Mun
authors.initials: YM
authors.lastname: Choo
mesh_terms: D000107:Acetylation; D031051:Alstonia / Q000737:chemistry*; D026121:Indole Alkaloids / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D008296:Malaysia; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D026121:Indole Alkaloids