p,p',p''-[phosphinylidynetris[[5-tert-butyl-2-methyl-4,1-phenylene]thio]]tris[6-tert-butyl-m-cresol]

4,4',4''-[Phosphinylidynetris[[5-(1,1-dimethylethyl)-2-methyl-4,1-phenylene]thio]]tris[2-(1,1-dimethylethyl)-5-methylphenol]