| abstract |
The present invention provides a compound of the following formula (I), (wherein, R1 represents an optionally substituted lower alkyl group, Y represents a group of the formula: -S(O)n- (n represents an integer of 1 or 2) or -CO-, R2 represents a hydrogen atom, or a lower alkyl group, R7 represents a hydrogen atom, or a lower alkyl group, X represents a lower alkylene group, a lower alkenylene group, an arylene group or a cycloalkylene group etc., Z represents a lower alkyl group, an optionally substituted cyclohydrocarbonic group, or an optionally substituted heterocyclic group etc.), or the pharmaceutically acceptable salt or solvate thereof. |