4-Nitro-6-[2-[1,3,3-trimethyl-1,3-dihydro-indol-(2E)-ylidene]-eth-(E)-ylidene]-cyclohexa-2,4-dienone

1,3,3-三甲基-2-亚甲基吲哚啉

5-硝基水杨醛

4-nitro-2-[(E)-2'-(1'',3'',3''-trimethyl-3H'''-2''-indoliumyl)-1'-ethenyl]-1-phenolate

1,2,3,3-四甲基-3H-吲哚鎓碘化物