2-Anilino-6-(N-ethyl-N-isobutylamino-3-methyl-fluoran

2'-Anilino-6'-(ethylisobutylamino)-3'-methylspiro[phthalide-3,9'-[9H]xanthene]

6'-(Ethylisobutylamino)-2'-anilino-3'-methylspiro[isobenzofuran-1(3H),9'-[9H]xanthen]-3-one

3'-(Ethylisobutylamino)-6'-methyl-7'-anilino-spiro[isobenzofuran-1(3H),9'-[9H]xanthene]-3-one

6'-(isobutylethylamino)-3'-methyl-2'-phenylamino-spiro[isobenzo-2-oxofuran-7,9'-[9H]-xanthene]

6-(Isobutyl ethyl amino)-3-methyl-2-phenylamino-spiro(iso-benzofuran-1-(3H),9,-(9H)xanthene)-3-one