Synonyms: | Phosphine oxide, 1,1',1'',1'''-[[5,11,17,23-tetrakis(1,1-dimethylethyl)pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-25,26,27,28-tetrayl]tetrakis(oxy-2,1-ethanediyl)]tetrakis[1,1-diphenyl- |