1-methoxy-4-[4-(4-methoxyphenyl)buta-1,3-diynyl]benzene

1,4-bis(4-tert-butylphenyl)buta-1,3-diyne

[5-(4-tert-Butyl-phenyl)-3-dibromomethylene-penta-1,4-diynyl]-trimethyl-silane

1-tert-Butyl-4-(3-dibromomethylene-penta-1,4-diynyl)-benzene