| abstract |
A compound represented by formula (I):nWherein R1 represents a hydrogen atom or a methyl group; R2 represents a C1-C12 hydrocarbon group; Xa and Xb each independently represent an oxygen atom or a sulfur atom; and X11 represents a C1-C12 divalent saturated hydrocarbon group in which a hydrogen atom may be replaced by a fluorine atom; A1 represents a C1-C12 divalent saturated hydrocarbon group or *-A2-X1-(A3-X2)a-A4-, wherein * represents a binding site with an oxygen atom, and A2, A3 and A4 each independently represent a C1-C12 two The valent hydrocarbon group, X1 and X2 each independently represents -O-, -CO-O-, -O-CO- or -O-CO-O-, and "a" represents 0 or 1. |