153440-42-7 1,4,10,13-Tetraaza-7,16-disilacyclooctadecane,1,4,10,13-tetraethyl-7,7,16,16-tetramethyl- 62624-84-4 1,4,7,10,13,16-Hexaoxacyclooctadecane-2,5,8,11,14,17-hexone,3,6,9,12,15,18-hexakis(1-methylethyl)- 296-43-5 1,3,5,7,9,11,13,15,17-Nonaoxa-2,4,6,8,10,12,14,16,18-nonasilacyclooctadecane