10493-50-2 2,2-Dimethyl-1,3-propanediyl bis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate) Benzenepropanoic acid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-, 2,2-dimethyl-1,3-propanediyl ester