bis[2-(2,2,6,6-tetramethylpiperidyl)ethyl] [[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate

2-[[3,5-Bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]-2-butylpropanedioic acid bis[2-(2,2,6,6-tetramethylpiperidino)ethyl] ester