BLACK 305

2-(Phenylamino)-6-(dipentylamino)-3-methylspiro[9H-xanthene-9,3'-phthalide]

2'-Anilino-3'-methyl-6'-(dipentylamino)spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one

6'-(Dipentylamino)-3'-methyl-2'-anilinospiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one