(1-Methylpropan-1-yl-3-ylidene)tris(2-tert-butyl-5-methyl-p-phenylene)tris(di(isotridecyl)phosphine) 67859-73-8 EINECS 267-421-1 Phosphorous acid, (1-methyl-1-propanyl-3-ylidene)tris(2-(1,1-dimethylethyl)-5-methyl-4,1-phenylene) hexaisotridecyl ester