116543-67-0 117247-96-8 65447-77-0 Butanedioic acid, dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Dimethyl butanedioate polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol Dimethyl succinate-1-(2-hydroxyethyl)-4-hydroxy-2,2,6,6-tetramethylpiperidine copolymer