Synonyms: Ethanesulfonamide,N-(6-cyano-3,4-dihydro-3-hydroxy-2,2-dimethyl-2H-1-benzopyran-4-yl)-N-methyl-,trans-(?à)-; 293B; Chromanol 239B;Chromanol 293B; Ethanesulfonamide,N-(6-cyano-3,4-dihydro-3-hydroxy-2,2-dimethyl-2H-1-benzopyran-4-yl)-N-methyl-,trans-