| 摘要 |
Novel oxindole derivative and salt thereof represented by the general formula, <IMAGE> 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 hydrogen atom or a lower alkyl group; R3 is a hydrogen atom, a cycloalkylcarbonyl group, a benzoyl group which may have 1 to 3 substituents selected from the group consisting of a halogen atom, a lower alkyl group and a lower alkoxy group on the phenyl ring, or a phenyl-lower alkanoyl group which may have halogen atoms as the substituents on the phenyl ring; provided that when R4 is a hydrogen atom, then R3 should be neither a hydrogen atom nor a lower alkyl group. The novel oxindole derivative and salt thereof possesses anti-peptic ulcer effects and are useful as anti-peptic ulcer agents.
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