The molecule is an iminium ion consisting of malachite green cation, substituted at the para position of the otherwise unsubstituted phenyl group with a diethylene glycol diamine linker, the terminal amino group of which may form part of a fluorogen activating protein (FAP). It has a role as a fluorogen. It derives from a malachite green cation.
[4-[[4-[4-[2-[[4-[2-[2-(2-aminoethoxy)ethoxy]ethylamino]-4-oxobutanoyl]amino]ethylamino]-4-oxobutoxy]phenyl]-[4-(dimethylamino)phenyl]methylidene]cyclohexa-2,5-dien-1-ylidene]-dimethylazanium