Gravar-mail: 4-(5-{2-[5-(4-Cyano­phen­yl)-3-methyl­thio­phen-2-yl]-3,3,4,4,5,5-hexa­fluoro­cyclo­pent-1-en-1-yl}-4-methyl­thio­phen-2-yl)benzo­nitrile chloro­form hemisolvate