A compound of the general formula 1:
or a salt or solvate thereof, in which, R' represents hydrogen or a lower alkyl group, R2 represents hydrogen, a lower alkyl group, or
R3 represents hydrogen, a lower alkyl group, or
R4 represents a lower alkyl group substituted by one or more fluorine atoms, R5 represents hydrogen, halogen or lower alkyl, and
R6 represents a lower alkyl or a substituted or unsubstituted carbocyclic aryl group.
通式 1 的化合物:或其盐或溶液,其中,R'代表氢或低级烷基,R2 代表氢、低级烷基,或 R3 代表氢、低级烷基,或 R4 代表被一个或多个
氟原子取代的低级烷基,R5 代表氢、卤素或低级烷基,R6 代表低级烷基或取代或未取代的碳环芳基。