2,2''-(((cyclopent-1-ene-1,2-diylbis(5-methylthiophene-4,2-diyl))bis(methaneylylidene))bis(azaneylylidene))bis(3',6'-bis(ethylamino)-2',7'-dimethylspiro[isoindoline-1,9'-xanthen]-3-one)

1-[5-(3-bromophenyl)-2-methylthien-3-yl]-2-(2-methyl-5-phenylthien-3-yl)cyclopentene

4,4'-(cyclopent-1-ene-1,2-diyl)bis(5- methylthiophene-2-carbonyl chloride)

1,2-bis[5'-(4''-acetylthio)-2'-methylthien-3'-yl]cyclopentene

1,2-bis[5'-(thien-2-yl)-2'-methylthien-3'-yl]cyclopentene