A new tetracyclic diterpene having molecular formula C20H28O2 and mole
cular mass of 300 a.m.u.. has been isolated From culture filtrate of a
strain of Trichoderma viride. The pure compound shows antifungal acti
vity: its structure elucidation was accomplished using 2D-NMR strategi
es and chemical derivatization. (C) 1997 Elsevier Science Ltd.