Volume 35 (1982) Issue 7 Pages 783-787
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.