. . . . . . . . . . . "[7] the haloester derivative (4) according to the above item [5], wherein X1 is a chlorine atom; W is methylene or ethane-1,1-diyl; n is 0 or 1; and R2, R3, R4, R5, R6, R7, R8, R9 and R10 are a hydrogen atom or methyl," . . . .