In this study a new 20-nor-ent-pimarane, named diplopimarane, was isolated together with
sphaeropsidins A (9) and C (10), and (+)-epiepoformin (11) from organic crude extracts of
Diplodia quercivora, a recently described oak pathogen originally found on declining
Quercus canariensis trees in Tunisia. Diplopimarane was characterized as (1 S, 2 R)-2, 8, 8-
trimethyl-2-vinyl-1, 2, 3, 4, 5, 6, 7, 8-octahydrophenanthrene-1, 9, 10-triol by spectroscopic, X-
ray, optical, and chemical methods. It exhibited a wide range of activities including …