113394-21-1 122655-66-7 2-(6-Hydroxy-3-oxo-(3H)-xanthen-9-yl)-5-isothiocyanatobenzoic acid 3326-32-7 55177-69-0 63469-13-6 86151-70-4 EINECS 222-042-0 FLUORESCEIN-5-ISOTHIOCYANATE Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dihydroxy-5-isothiocyanato-