. . . . "ike, which may be substituted by a halogen atom, a nitro group, a cyano group, an alkyl group such as methyl group, ethyl group and the like, an alkoxy group such as methoxy group, ethoxy group and the like, an aryloxy group such as phenoxy group and the like, an aryl group such as phenyl group, naphthyl group and the like, an aralkyl group such as benzyl group, phenethyl group and the like." .