BIS(2,2,6,6-TETRAMETHYL-4-PIPERIDYL)SUCCINATE Bis-(2,2,6,6-tetramethyl-4-piperidinyl)-succinate Butanedioic acid bis(2,2,6,6-tetramethyl-4-piperidinyl) ester HL-186 Succinic acid bis(2,2,6,6-tetramethyl-4-piperidinyl) ester Succinic acid bis(2,2,6,6-tetramethylpiperidin-4-yl) ester Butanedioic acid, 1,4-bis(2,2,6,6-tetramethyl-4-piperidinyl) ester