Ethyl 4,4-di-(4-hydroxy-3-t-butyl-phenyl)-valerate 、
2,2,6,6-四甲基哌啶胺 以produces 4-[4,4-bis-(3-tert.-butyl-4-hydroxyphenyl)-valeramido]-2,2,6,6-tetramethylpiperidine having a melting point 133°的产率得到4,4-di-(4-hydroxy-3-t-butyl-phenyl)-valeric acid (2,2,6,6-tetramethyl-piperidin-4-yl)-amide