amino cyclitol glycoside aminoglycoside antibiotic diol monocarboxylic acid amide astromicin An amino cyclitol glycoside that is <small>L</small>-<em>chiro</em>-inositol in which the hydroxy groups at positions 1, 4, and 6 are replaced by aminoacetyl)methylamino, amino, and methoxy groups, respectively, and in which the hydroxy group at position 3 is converted to the corresponding 2,6-diamino-2,3,4,6,7-pentadeoxy-β-<small>L</small>-<i>lyxo</i>-heptopyranoside. The major component of fortimicin, obtained from <em>Micromonospora olivasterospora</em>. It is administered (as the sulfate salt) by intramuscular injection or intravenous infusion for the treatment of severe systemic infections due to sensitive Gram-negative organisms. primary amino compound