prov:value
| - Novel carbostyril derivatives represented by the general formula (1), ##STR1## wherein R1 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a phenyl-lower alkyl group; R2 is a lower alkanoyl group, a lower alkoxycarbonyl group, a furoyl group, a lower alkane-sulfonyl group, a substituted benzoyl group, a substituted phenyl-lower alkenylcarbonyl group, a pheno
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