of a compound of the formula: [0097] wherein m is 1 or 2; [0098] R1 is a halogen atom or an optionally halogenated C1-2 alkyl group; [0099] one of R2 and R3 is a hydrogen atom and the other is a group represented by the general formula: [0100] wherein n is 3 or 4; R4 is a C1-4 alkyl group substituted by 1 or 2 hydroxy groups, and the like. [0101] Moreover, the present invention relates to [0102]