This invention relates to novel aminoglycoside antibiotics, which have
potent antimicrobial activity against bacteria, which induce infectious
diseases, particularly MRSA, and has no significant nephrotoxicity, and
process for producing them. More particularly, the present invention
relates to compounds represented by formula (Ia) or their
pharmacologically acceptable salts or solvates, or their diastereomer
mixtures, antimicrobial agents comprising them, and a process for
producing them.
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