A new bis-diterpene, moldenin (6), derived from the esterification of 3-oxo
-8(17)-15-labdenic acid with 3 beta-hydroxy-8(17)-15-labdenol, four normal-
labdane diterpenes 1-4, and betulinic add were isolated from the stems of M
oldenhawera nutans. The structures were established on the basis of their s
pectral data. (C) 1998 Elsevier Science Ltd. All rights reserved.