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AssigneeOtsuka Pharmaceutical Co., Ltd.
InventorsKazuyuki Nakagawa, Shiro Yoshizaki, Kaoru Tanimura, Shigeharu Tamada
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5-[Hydroxy-2-(substituted-amino)]ethyl-8-hydroxy-carbostyril derivatives represented by the formula (I) ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aralkyl group containing a straight or branched chain alkyl moiety having 1 to 4 carbon atoms or a cycloalkyl group having 4 to 6 carbon atoms, or R.sup.1 and R.sup.2 may, when taken together with the nitrogen atom to which they are attached, form a 5 or 6-membered substituted or unsubstituted heterocyclic ring containing 1 or 2 nitrogen, oxygen or sulfur atoms as hetero atoms, the pharmaceutically acceptable acid addition salts thereof and a process for preparing the above compounds.
A 5-[1-Hydroxy-2-(substituted-amino)]-ethyl-8-hydroxycarbostyril derivative represented by the formula (I) ##STR13## wherein R.sup.1 and R.sup.2, which may be the same or different, each represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, a phenylalkyl group containing a straight or branched chain alkyl moiety having 1 to 4 carbon atoms or a cycloalkyl group having 4 to 6 carbon atoms, or R.sup.1 and R.sup.2 may, when taken together with the nitrogen atom to which they are attached, form a pyrrolidine, piperidine, morpholine, or piperazine ring which can be unsubstituted or substituted with an alkyl group having 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.