Terrecyclic acid A, a new antibiotic from Aspergillus terreus. II. Structure of terrecyclic acid A.

Abstract

The structure of a new antibiotic, terrecyclic acid A, from a strain of Aspergillus terreus Thom, was established as I on the basis of spectroscopic and chemical evidences, by comparison of spectroscopic data with quadrone, a known antitumor substance, and further by conversion of terrecyclic acid A to quadrone through pyrolysis.