2''-N-Formimidoylistamycin B disulfate tetrahydrate 77312-56-2 D-allo-Inositol, 2-amino-1-O-(2-amino-2,3,4,6-tetradeoxy-6-(methylamino)-alpha-D-erythro-hexopyranosyl)-2,3,5-trideoxy-5-((((iminomethyl)amino)acetyl)methylamino)-4-O-methyl-, sulfate, hydrate (1:2:4)