2',6'-Bis(diethylamino)spiro(isobenzofuran-1(3H),9'-(9H)xanthene)-3-one 72829-10-8 EINECS 276-902-5 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 2',6'-bis(diethylamino)-3'-methyl-