- 2’,7′-Dichloro-3’,6′-dihydroxy-3-oxo-3H-spiro-[isobenzofuran-1,9′-xanthene]-5-carboxylic acid,95%, 1g
- 2’,7′-Dichloro-3’,6′-dihydroxy-3-oxo-3H-spiro-[isobenzofuran-1,9′-xanthene]-5-carboxylic acid,95%, 250mg