| abstract |
A resin comprising a structural unit represented by formula (I0): n n n n n n n n n n wherein A 1 , A 2 and A 3 each independently represent a C2-C18 divalent hydrocarbon group, n R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom or a C1-C6 saturated hydrocarbon group, n X 1 and X 2 each independently represent *—O—CO—, —O—CO—O— or —O—, and * represents a binding site to A 2 or A 3 . |