Four new metabolites with carotane skeletons, trichocaranes A (1), B (2), C
(3), and D (4), were isolated from Trichoderma virens and their structures
established by the interpretation of NMR and mass spectroscopic data. The
trichocaranes significantly inhibited the growth of etiolated wheat coleopt
iles: 40% at 10(-4) M with 1 and 2 and 86% at 10(-3) M with 3.