(2-Nitroaniline-N-ethyldithio)-2-(pyridyl-5-thioureido-N'-(5-fluorescein)) 101613-93-8 Farssalc N-(3',6'-Dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-5-yl)-N'-(6-((2-((2-nitrophenyl)amino)ethyl)dithio)-3-pyridinyl)thiourea Thiourea, N-(3',6'-dihydroxy-3-oxospiro(isobenzofuran-1(3H),9'-(9H)xanthen)-5-yl)-N'-(6-((2-((2-nitrophenyl)amino)ethyl)dithio)-3-pyridinyl)-