Complete H-1 and C-13 NMR chemical shift assignments were made for tar
axerene from HMQC and HMBC spectra. Methyl proton shifts were assigned
for 11 other taraxerenes. Molecular mechanics calculations and NMR ev
idence supported the p-bromobenzyl acetylaleuritolate x-ray conformati
on for taraxerenes in solution. (C) 1998 John Wiley & Sons, Ltd.