halogen atom, a hydroxyl group, a mesyloxy group or a tosyloxy group or --OCOR7 wherein R7 is defined above; R9 is an alkyl group having 1 to 5 carbon atoms or a mesyl group;the phenyl group having a R1 (CH2)m CONH group in the formula (1) is optionally substituted by the R1 (CH2)m CONH group at any position of the phenyl group with the proviso that when m is 1, R1 is not a hydrogen atom; and whe