label: 2-cyano-3-(5'''-(9-ethyl-9H-carbazol-3-yl)-3',3',3''',4-tetrahexyl(2,2'-5-,2''-5'',2'''-quaterthiophene)-5-yl)-2-propenoic acid
label_lc: 2-cyano-3-(5'''-(9-ethyl-9h-carbazol-3-yl)-3',3',3''',4-tetrahexyl(2,2'-5-,2''-5'',2'''-quaterthiophene)-5-yl)-2-propenoic acid