Daedaleanols A and B, two new sesquiterpenes from cultures of the basidiomycete Daedalea incana

Two new sesquiterpenes, daedaleanols A (1) and B (2), together with three known sesquiterpenes (3–5), were isolated from cultures of the basidiomycete Daedalea incana. Their structures were elucidated on the basis of extensive spectroscopic means. All compounds were tested for their cytotoxicities against three human cancer cell lines.