Synonyms: Benzenepropanoicacid, 3,5-bis(1,1-dimethylethyl)-4-hydroxy-,(1,2-dioxo-1,2-ethanediyl)bis(imino-2,1-ethanediyl) ester (9CI);2,2'-Oxamidobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate];2,2'-Oxamidodiethyl bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate];N,N'-Bis(2-hydroxyethyl)oxamide bis[b-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate];Naugard XL 1;XL 1;antioxidant 697