Synonyms: 3(or 4)-Sulfo-1,2-benzenedicarboxylic acid, 1-[1-methyl-2-[(2-methyl-1-oxo-2-propenyl)oxy]ethyl]ester polymer with butyl 2-methyl-2-propenoate, butyl 2-propenoate, methyl 2-methyl-2-propenoate and 2-methyl-2-propenoic acid;1,2-Benzenedicarboxylic acid, 3(or 4)-sulfo-, 1-[1-methyl-2-[(2-methyl- 1-oxo-2-propenyl)oxy]ethyl] ester, polymer with butyl 2-methyl-2-propenoate, butyl 2-propenoate, methyl 2-methyl-2-propenoate and 2-methyl-2-propenoic acid