英文名称:2-Propenoic acid sodium salt polymer with 1-ethenyl-2-pyrrolidinone and 2-propen- amide; 2-Propenoic acid, sodium salt (1:1), polymer with 1-ethenyl-2-pyrrolidinone and 2-propenamide; 2-Propenoic acid, sodium salt, polymer with 1-ethenyl-2-pyrrolidinone and 2-propenamide