17beta-Estradiol, 4-amino-N-fluorescein isothiocyanate- 4-Amino-N-fluorescein isothiocyanate-17-estradiol 4-Nhef 82420-81-3 Estradiol-4A-FITC Spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3',6'-diol, 3-(((17beta)-3,17-dihydroxyestra-1,3,5(10)-trien-4-yl)imino)-5(or6)-isothiocyanato-