Okachi R, Takasawa S, Sato T, Sato S, Yamamoto M, Kawamoto I, Nara T
J Antibiot (Tokyo). 1977 Jul;30(7):541-51. doi: 10.7164/antibiotics.30.541.
The aminoglycoside antibiotics fortimicins A and B produced by a naturally occurring strain Micromonospora sp. MK-70 were isolated from its fermentation beer. Fortimicins A and B were isolated as water-soluble, basic, white amorphous powders having molecular formula C17H35N5O6 and C15H32N4O5, respectively. Acid hydrolysis of fortimicin A indicated that it has one mole of glycine in its molecule while fortimicin B has not. Paper chromatography, silica-gel and carbon thin-layer chromatography revealed that fortimicins A and B are novel aminoglycoside antibiotics.
