Js. Alves et al., Complete assignment of the H-1 and C-13 NMR spectra of four triterpenes ofthe ursane, artane, lupane and friedelane groups, MAGN RES CH, 38(3), 2000, pp. 201-206
The detailed H-1 and C-13 NMR assignments of the four known triterpenes 3 b
eta-hydroxyurs-12-en-28-oic acid, 3-oxo-24-methylenecycloartan, 5-oxo-11 al
pha-hydroxy-20(29)lupen and 29-hydroxyfriedelin, isolated from three Brazil
ian plants, were achieved by 1D and 2D techniques such as DEFT, HETCOR, HMQ
C, HMBC, COSY and NOESY. Copyright (C) 2000 John Wiley & Sons, Ltd.