145497-36-5 2-Hydroxyethyl methacrylate polymer with 1-vinyl-2-pyrrolidinone, 4-tert-butyl-2-hydroxycyclohexyl methacrylate, ethylene dimethacrylate and 2-(methacryloyloxy)ethyl vinyl carbonate 2-Propenoic acid, 2-methyl-, 2-hydroxyethyl ester, polymer with 1-ethenyl-2-pyrrolidinone, 4-(1,1-dimethylethyl)-2-hydroxy-cyclohexyl 2-methyl-2-propenoate, 1,2-ethanediyl bis(2-methyl-2-propenoate) and 2-(((ethenyloxy)carbonyl)oxy)-ethyl 2-methyl-2-propenoate Alphafilcon A Alphafilcon A [USAN]