... 2. 3',6'-Di-O-acetyl-4-nitrofluorescein (à 3',6'-Bis(acetyloxy)-4-nitrospiro[isobenzofuran-1(3H), 9'- [9H]xanthen]-3-one; 5). The mother liquor of 6 was concentrated to a smaller volume to give a second fraction of 6 (2 g). The filtrate was ... Helvetica Chimica Acta ± Vol. 86 (2003) 2315 ...
![(6'-acetyloxy-5-nitro-3-oxospiro[2-benzofuran-1,9'-xanthene]-3'-yl) acetate Structure](https://image.chemsrc.com/caspic/238/14926-29-5.png)
