ARANOROSIN, A NOVEL ANTIBIOTIC FROM PSEUDOARACHNIOTUS ROSEUS

Aranorosin, a new antifungal antibiotic, has been isolated from the culture filtrate and mycelium of a strain of Pseudoarachniotus roseus Kuehn. The antibiotic, C23H33NO6, contains a novel l-oxaspiro[4, 5]decane ring system. The structure (I) has been elucidated on the basis of spectroscopic and chemical analysis.