1461-15-0 2,7-Bis[N,N-bis(carboxymethyl)aminomethylene]fluorescein Acetic acid, [(3',6'-dihydroxy-2',7'-fluorandiyl)bis(methylenenitrilo)]tetra- Calcein Fluorescein complexon Fluorescein, 2',7'-bis[[bis(carboxymethyl)amino]methyl]- Fluorexon Glycine, N,N'-[(3',6'-dihydroxy-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-2',7'-diyl)bis(methylene)]bis[N-(carboxymethyl)- NSC298193