human serum albumin journal of organic chemistry 1998 63 9019 9030 each of which is expressly incorporated by reference herein in its entirety the inventive azide derivatives contain additional functionalities that can be used to attach various types of biomolecules synthetic polymers and organized aggregates for selective delivery to various organs or tissues of interest preparations of representative compounds from the preferred embodiment are outlined in fig2 5 a typical preparation of a tetrafluorophenylazide derivative is shown in fig2 methyl 2 3 4 5 6 pentafluorophenylbenzoate is reacted with sodium azide in aqueous acetone and the resulting azidoester is saponified with sodium hydroxide to give 4 azido 2 3 5 6 tetrafluorobenzoic acid the azidoacid is then converted to the corresponding active ester using n hydroxysuccimide nhs and dicyclohexylcarbodiimide dcc the active ester can be attached to any desired biomolecule of interest specifically the biomolecules bind to colorectal cervical ovarian lung and neuroendocrine tumors and include somatostatin cholesystekinin bombesin neuroendrocrine and st receptor binding compounds an acridone derivative is prepared according to fig3 the starting aminoacridone is converted to the azide by a standard method of diazotization of the amino group and displacement of the diazonium group with sodium azide as disclosed in k matsumura 1 aminoacridine 4 carboxylic acid journal of the american chemical society 1938 32 591 592 which is expressly incorporated by reference herein in its entirety the azide is then conjugated to the biomolecules directly using an automated peptide synthesizer or indirectly by the active ester route a typical preparation of an azidoxanthone derivative is outlined in fig4 the acid chloride is reacted.