1,1,4,4,7,7,10,10,13,13,16,16-Dodecamethyl-1,4,7,10,13,16-hexasila-cyclooctadeca-2,8,14-triyne

1,1,4,4,7,7,10,10-octamethyl-1,4,7,10-tetrasilacyclododeca-5,11-diyne

1,1,4,4,7,7,10,10,13,13,16,16,19,19,22,22-Hexadecamethyl-1,4,7,10,13,16,19,22-octasila-cyclotetracosa-2,8,14,20-tetrayne