| abstract |
Formula (I): (Where R 1 is a lower alkyl, cycloalkyl or aromatic hydrocarbon ring, each of which may be substituted with one or more substituents; R 2 is a hydrogen atom, a halogen atom, lower alkyl, halo (lower) alkyl or lower alkoxy; and R 3 is (1) Formula: A group represented by the formula: wherein R 4 is lower alkyl or the like; (2) Formula: A group represented by the formula: wherein R 5 is lower alkyl or the like; (3) Formula: (Wherein R 6 is lower alkyl or the like); or (4) a group selected from a halogen atom, carboxy, hydroxy and lower alkoxy. ) Or a salt thereof. [Selection figure] None |