2-Propenoic acid, 2-methyl-, methyl ester, polymer with ethyl 2-propenoate and 2-methyl-2-((1-oxo-2-propenyl)amino)-1-propanesulfonic acid 501100-44-3 67892-92-6 Ethyl acrylate, methyl methacrylate, 2-acrylamido-2-methylpropanesulfonic acid polymer Methyl methacrylate, polymer with ethyl acrylate, 2-acrylamido-2-methylpropanesulfonic acid