Istamycin A-3

2''-formimidoylistamycin A

2''-N-Formimidoylistamycin A

4-Amino-3-O-[2-amino-2,3,4,6-tetradeoxy-6-(methylamino)-α-D-erythro-hexopyranosyl]-1,4,5-trideoxy-1-[[[(iminomethyl)amino]acetyl]methylamino]-6-O-methyl-L-chiro-inositol