gentamycin aminoglycoside sulfate salt gentamicin sulfate 545.237 545.607 C19H37N5O7R2.H2O4S CAS:1405-41-0 CHEBI:5312 Gentamicin C complex sulfate Gentamicin sulfate Gentamycin sulfate KEGG:C11334 KEGG:D01063 OS(O)(=O)=O.CN[C@@H]1[C@@H](O)[C@@H](O[C@H]2[C@H](N)C[C@H](N)[C@@H](O[C@H]3O[C@@H](CC[C@H]3N)[C@@H]([*])N[*])[C@@H]2O)OC[C@]1(C)O chebi_ontology gentamicin sulfates