93697-52-0 15,18-Dioxa-12,21-diazadotriacontanedioic acid,12,16,16,17,17,21-hexamethyl-13,20-dioxo-, diethyl ester 649728-12-1 3,10,14,21-Tetraoxa-2,4,20,22-tetrasilatricosane,2,4,4,20,20,22-hexamethyl-12,12-bis[[[5-(1,1,3,3-tetramethyldisiloxanyl)pentyl]oxy]methyl]- 65104-63-4 1,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,17,17,18,18-heptatriacontafluoro-20-iodoicosane