| abstract |
A compound of formula I: ** Formula ** including its free form, salt form, stereoisomer, enantiomer, diastereomer or hydrate, wherein Z is CH or N; R1, R2 and R3 are each hydrogen, halo, alkyl, alkoxy or trifluoromethyl; R4 is ** Formula ** X is a benzene ring or a pyridine ring; R5 is one or more substituents selected from the group consisting of hydrogen, halo, alkyl, alkoxy and trifluoromethyl. |