BLACK 305;2-(Phenylamino)-6-(dipentylamino)-3-methylspiro[9H-xanthene-9,3'-phthalide];2'-anilino-6'-(dipentylamino)-3'-methylspiro[2-benzofuran-3,9'-xanthene]-1-one;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;Spiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one, 6'-(dipentylamino)-3'-methyl-2'-(phenylamino)-