134546-27-3 2,4-Dinitrophenol-insulin A chain-fluorescein conjugate Dnp-insulin-fluorescein Insulin (ox-A reduced), N-(2,4-dinitrophenyl)-, tris(2-((2-(((3',6'-dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-5-yl)amino)thioxomethyl)hydrazino)carbonyl)hydrazide), 6,7,11,20-tetrakis(hydrogen sulfate)