| abstract |
Compound of formula (1): ** (See formula) ** or pharmaceutically acceptable salt thereof, wherein R1 to R4 are independently hydrogen atom, halogen, OH, CN, C1-6 alkyl group, C1 alkyl group -6 halogenated, C2-6 alkenyl group, C1-6 alkoxy group or halogenated C1-6 alkoxy group, provided that one or two of R1 to R4 are hydrogen atoms, but not all three or four thereof are hydrogen atoms, and Y is C1-6 alkylene or C2-6 alkenylene group, wherein the alkylene or alkenylene group may be substituted with one or more substituents independently selected from the group consisting of C1-6 alkyl group , halogen and halogenated C1-6 alkyl group, in which in addition a carbon atom that can be substituted in the substituent that is attached to the alkylene or alkenylene group and another carbon atom that can be substituted in the alkylene or alkenylene group, or two carbon atoms that can be substituted in the substitution Tuuent that binds to the alkylene or alkenylene group, can combine with each other to form a 3- to 6-membered carbon ring. |