Importance

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Abstract

An erythromycin A derivative represented by the formula: ##STR1## wherein n is an integer of from 1 to 8, R.sup.1 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R.sup.2 is a pyridylmethyl group, a quinolylmethyl group, a pyridylsulfonyl group or quinolylsulfonyl group, R.sup.3 is a hydrogen atom, an alkyl group having 1 to 6 carbon atoms or a cinnamyl group, R.sup.4 is a cladinosyloxy group or a group represented by the formula: ##STR2## wherein m is 0 or 1, R.sub.5 is a pyridyl group, a quinolyl group, a phenyl group, a phenyl group substituted with one, two or three members selected from alkyl groups having 1 to 6 carbon atoms, a nitro group, alkoxy groups having 1 to 3 carbon atoms and halogen atoms, or a pyridyl or quinolyl group substituted with one or two members selected from alkyl groups having 1 to 6 carbon atoms, a nitro group, alkoxy groups having 1 to 3 carbon atoms and halogen atoms; or a pharmaceutically acceptable salt thereof.

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First Claim