2-Propenenitrile, 3-(3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl)-2-(methylsulfonyl)- 3-(3,5-Bis(1,1-dimethylethyl)-4-hydroxyphenyl)-2-(methylsulfonyl)-2-propenenitrile 83677-23-0 beta-(Methylsulfonyl)-beta-cyano-3,5-di-tert.butyl-4-hydroxystyrene