Alstonic acids A and B, unusual 2,3-secofernane triterpenoids from Alstonia scholaris.
2,3-Secofernane triterpenoids, alstonic acids A (1) and B (2), were isolated from the leaves of Alstonia scholaris together with an indole alkaloid, N(1)-methoxymethyl picrinine (3). Their structures were established from MS and NMR spectroscopic analyses and confirmed by single crystal X-ray diffraction analysis.
State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China.
Fei
F
Wang
Fu-Cai
FC
Ren
Ji-Kai
JK
Liu
D031051:Alstonia / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D008958:Models, Molecular; D021241:Spectrometry, Mass, Electrospray Ionization; D013055:Spectrophotometry, Infrared; D014315:Triterpenes / Q000737:chemistry* / Q000302:isolation & purification
D014315:Triterpenes