Six New Induced Sesquiterpenes from the Cultures of Ascomycete Daldinia concentrica.

Six new sesquiterpenes having the botryane carbon skeleton (1 similar to 6), together with known compounds (7 similar to 10) were induced and isolated from the ascomycete Daldinia concentrica (strain S 0318). Structures elucidation was accomplished by NMR spectroscopic and X-ray crystallographic studies.