Rhizophins A and B, new sesquiterpenes from the culture broth of Coprinus rhizophorus.

Two new sesquiterpenes (1 and 2) together with one known compound (3) were isolated from the culture broth of Coprinus rhizophorus. Chemical structures of these compounds were deduced by spectroscopic methods. Compound 1 exhibited free-radical-scavenging activity against the 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical. Compounds 2 and 3 exhibited antimicrobial activities against Saccharomyces cerevisiae, Propionibacterium acnes, and Staphylococcus epidermidis.