IRD40 covalently attached to deoxyadenosine triphosphate; structure given in first source; IRD40 - 4-(2-(4-((4-isothiocyanatophenyl)oxy)-7-(3,3-dimethyl-1-(4-sulfonatobutyl)indolin-2-ylidene)-3,5-(propane-1,3-diyl)-1,3,5-heptatrien-1-yl)-3,3-dimethyl-3H-indolo)butanesulfonate