20811-87-4 3,3-Diphenylpropionic acid 1,2,2,6,6-pentamethyl-4-piperidinyl ester 4-Piperidinol, 1,2,2,6,6-pentamethyl-, 3,3-diphenylpropionate (ester) BRN 1494573 Propionic acid, 3,3-diphenyl-, 1,2,2,6,6-pentamethyl-4-piperidinyl ester