Antibiotics 13285 A1 and A2: novel cepham and penam metabolites from a Streptomyces species
Abstract
The norpenicillin N (1b) and the isomeric cepham (2) have been isolated from a Streptomyces species and identified from 1H n.m.r. spectroscopy and detection of D-α-aminoadipic acid following acid hydrolysis.