Lysinomicin, a new aminoglycoside antibiotic. II. Structure and stereochemistry.

Abstract
The structure of lysinomicin, a new aminocyclitol antibiotic [antibacteria], was established as 3-epi-2''-N-(L-.beta.-lysyl)-4'',5''-didehydro-6''-de-C-methylfortimicin B (1) on the basis of spectral evidence and chemical degradation of the antibiotic. In the course of degradation of 1 3 addititional compounds with interesting biological properties were obtained: 3-epi-2''-n-(L-.beta.-lysyl)-6''-de-C-methylfortimicin B; 3-epi-4'',5''-didehydro-6''-de-C-methylfortimicin B; and 3-epi-6''-de-C-methylfortimicin B.