2''-N-Formimidoylistamycin A disulfate trihydrate 81202-84-8 L-chiro-Inositol, 4-amino-3-O-(2-amino-2,3,4,6-tetradeoxy-6-(methylamino)-alpha-D-erythro-hexopyranosyl)-1,4,5-trideoxy-1-((((iminomethyl)amino)acetyl)methylamino)-6-O-methyl-, sulfate (1:2)