2-(2-Ethoxyethylamino)-3-chloro-6-diethylaminospiro[9H-xanthene-9,3'-phthalide]

3'-Chloro-6'-diethylamino-2'-(2-ethoxyethylamino)spiro[phthalide-3,9'-[9H]xanthene]

3'-chloro-6'-(diethylamino)-2'-[(2-ethoxyethyl)amino]spiro[isobenzofuran-1[3H],9'-[9H]xanthene]-3-one