DIHYDROPYRIDINE-5-PHOSPHONIC ACID CYCLIC PROPYLENE ESTER

摘要

A compound of the formula: wherein each of R<1>, R<2>, R<3>, R<4>, R<5> and R<6> which may be the same or different, is hydrogen or C1-C4 alkyl; one of X<1> and X<2> is nitro, fluorine, chlorine, difluoromethoxy or trifluoromethyl and the other is hydrogen, or both of X<1> and X<2> are chlorine; and Y is wherein A is C2-C6 alkylene, each of Ar<1> and Ar<2> which may be the same or different, is phenyl which may be substituted by chlorine, fluorine or C1-C3 alkoxy, and m is an integer of from 0 to 4, or Y is wherein A, Ar<1> and Ar<2> are as defined above when that both X<1> and X<2> are chlorine; or a pharmaceutically acceptable salt thereof, or a solvate of the compound or the salt.