A compound represented by formula: wherein R 1 and R 2 each independently represent a hydrogen atom or an alkyl group; Y represents -COO-; Rf represents a linear or branched perfluoroalkylene group having 1 to 20 carbon atoms or a linear or branched perfluoroether group having 1 to 20 carbon atoms; n represents 1 or 2; m represents an integer of 1 to 6; p represents an integer of 2 or 3; and q represents an integer of 0 or 1 such that p+q = 3; and R 3 and R 4 each independently represents a hydrogen atom or a substituent selected from a halogen atom, an optionally substituted, linear, branched or cyclic alkyl group, an optionally substituted, linear, branched or cyclic alkenyl group, an optionally substituted alkynyl group having 2 to 30 carbon atoms, an optionally substituted aryl group having 6 to 30 carbon atoms, an optionally substituted 5- or 6-membered monovalent group obtained by removing one hydrogen atom from an aromatic or non-aromatic heterocyclic compound, a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an optionally substituted alkoxy group having 1 to 30 carbon atoms, an optionally substituted aryloxy group having 6 to 30 carbon atoms, a silyloxy group having 3 to 20 carbon atoms, an optionally substituted heterocyclic oxy group having 2 to 30 carbon atoms, an acyloxy group, an optionally substituted carbamoyloxy group having 1 to 30 carbon atoms, an optionally substituted alkoxycarbonyloxy group having 2 to 30 carbon atoms, an optionally substituted aryloxycarbonyloxy group having 7 to 30 carbon atoms, an amino group, an acylamino group, an optionally substituted aminocarbonylamino group having 1 to 30 carbon atoms, an optionally substituted alkoxycarbonylamino group having 2 to 30 carbon atoms, an optionally substituted aryloxycarbonylamino group having 7 to 30 carbon atoms, an optionally substituted sulfamoylamino group having 0 to 30 carbon atoms, an optionally substituted alkylsulfonylamino group having 1 to 30 carbon atoms, an optionally substituted arylsulfonylamino group having 6 to 30 carbon atoms, a mercapto group, an optionally substituted alkylthio group having 1 to 30 carbon atoms, an optionally substituted arylthio group having 6 to 30 carbon atoms, an optionally substituted heterocyclic thio group having 2 to 30 carbon atoms, an optionally substituted sulfamoyl group having 0 to 30 carbon atoms, a sulfo group, an optionally substituted alkylsulfinyl group having 1 to 30 carbon atoms, an optionally substituted arylsulfinyl group having 6 to 30 carbon atoms, an optionally substituted alkylsulfonyl group having 1 to 30 carbon atoms, an optionally substituted arylsulfonyl group having 6 to 30 carbon atoms, an acyl group, an optionally substituted aryloxycarbonyl group having 7 to 30 carbon atoms, an optionally substituted alkoxycarbonyl group having 2 to 30 carbon atoms, an optionally substituted carbamoyl group having 1 to 30 carbon atoms, an optionally substituted arylazo group having 6 to 30 carbon atoms, an optionally substituted heterocyclic azo group having 3 to 30 carbon atoms, an imide group, an optionally substituted phosphino group having 2 to 30 carbon atoms, an optionally substituted phosphinyl group having 2 to 30 carbon atoms, an optionally substituted phosphinyloxy group having 2 to 30 carbon atoms, an optionally substituted phosphinylamino group having 2 to 30 carbon atoms, and an optionally substituted silyl group having 3 to 30 carbon atoms; different units represented by CR 3 R 4 may have the same or different structures; and R 3 and R 4 may together form a ring.