5'-nitrofluorescein;
3',6'-Dihydroxy-4-nitro-3H-spiro[2-benzofuran-1,9'-xanthen]-3-one;
3',6'-dihydroxy-6-nitro-spiro[isobenzofuran-3,9'-xanthene]-1-one;
4-NITROFLUOROESCEIN;
3',6'-dihydroxy-5-nitro-spiro[phthalan-1,9'-xanthen]-3-one;
5-Nitro-3',6'-dihydroxyspiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one;
3',6'-dihydroxy-5-nitrospiro[2-benzofuran-3,9'-xanthene]-1-one;
Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 3',6'-dihydroxy-4-nitro-;
3',6'-Dihydroxy-5-nitro-spiro[phthalan-1,9'-xanthen]-3-on;
5-Nitrofluorescein (isomer I);
5-NITRO-3',6'-DIHYDROXYSPIRO[ISOBENZOFURAN-1(3H),9'-(9H)XANTHEN]-3-ONE;
3',6'-Dihydroxy-5-nitrospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one;
3',6'-dihydroxy-6-nitrospiro[2-benzofuran-3,9'-xanthene]-1-one;
4-Nitrofluorescein;