. . . "s 1]##STR00005##(In the formulas, R is an alkyl group having 1 6 carbon atoms such as methyl, ethyl, Q is a releasing group such as chlorine, bromine, and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, A, X.sup.1, Y, X.sup.2 an" . .