3',6'-Dichlorofluoran 3',6'-Dichlorospiro(phthalide-3,9'-xanthene) 630-88-6 EINECS 211-147-7 Fluoran, 3',6'-dichloro- (8CI) Fluorescein chloride Fluorescein dichloride NSC 231613 Spiro(isobenzofuran-1(3H),9'-(9H)xanthen)-3-one, 3',6'-dichloro-