| 主权项 |
1. A compound represented by the following general formula (I) or a salt thereof: wherein X is SO2 or CO; R1 is n is 1, 2 or 3; R2 is a hydrogen atom or an alkyl group having 1 to 3 carbon atoms; R3 is (i) an aralkenyl group or an aralkyl group, the alkenyl moiety being substituted or unsubstituted and having 2 to 6 carbon atoms, the alkyl moiety being substituted or unsubstituted and having 1 to 6 carbon atoms and the aryl moiety may have one or more substituents selected from the group consisting of a halogen atom, —NH2, —NO2, —CN, —OH, a C1-C4 alkyl group, a C1-C4 alkoxy group and —COOR5 wherein R5 is a hydrogen atom or a C1-C4 alkyl group, and wherein two adjacent substituents of the aryl moiety may be connected to form a methylenedioxy group or an ethylenedioxy group; (ii) an aryl group or a heteroaryl group, both of which may have one or more substituents selected from the group consisting of a halogen atom, —NH2, —NO2, —CN, —OH, a C1-C4 alkyl group, a C1-C4 alkoxy group and —COOR5 wherein R5 is a hydrogen atom or a C1-C4 alkyl group, wherein two adjacent substituents of the aryl group may be connected to form a methylenedioxy group or an ethylenedioxy group, and wherein if R1 is formula (III), R2 is a hydrogen atom and X is CO, R3 is not an o-nitrophenyl group; or (iii) a heteroaralkenyl group or a heteroaralkyl group, the alkenyl moiety being substituted or unsubstituted and having 2 to 6 carbon atoms, the alkyl moiety being substituted or or unsubstituted and having 1 to 6 carbon atoms and the heteroaryl moiety may have one or more substituents selected from the group consisting of a halogen atom, —NH2, —NO2, —CN, —OH, a C1-C4 alkyl group, a C1-C4 alkoxy group and —COOR5 wherein R5 is a hydrogen atom or a C1-C4 alkyl group; and R4 is a C1-C4 alkyl group or an aryl group, wherein when n is 2, the moiety of the formula (II) or (III) many be substituted with a hydroxyl group. |
