1-(6-ethynyl-1,3,5-cycloheptatrienyl)-11-methyl-1,3,6,8,10-tridecapentaen-12-yn-5-one

1-(6-ethynyl-1,3,5-cycloheptatrienyl)-5-(2-ethynylphenyl)-2-methyl-1,4-pentadien-3-one

1-(6-ethynyl-1,3,5-cycloheptatrienyl)-7-methyl-1,4,6-nonatrien-8-yn-3-one

1-(6-ethynyl-1,3,5-cycloheptatrienyl)-9-methyl-1,3,6,8-undecatetraen-10-yn-5-one

1-(6-ethynyl-1,3,5-cycloheptatrienyl)-9-methyl-1,4,6,8-undecatetraen-10-yn-3-one