Patent ID: 7947253

Claim:
A compound represented by the structure as set forth in formula II, including pharmaceutically acceptable salts, hydrates, solvates and metal chelates of the compound represented by the structure as set forth in formula (II) and solvates and hydrates of the salts; wherein R represents hydrogen or C 1 , C 2 , C 3 , C 4 , C 5 , C 6 , C 7 , C 8 , C 9 , C 10 , C 11 , C 12 , C 13 , C 14 , C 15 or C 16 linear or branched alkyl; n and m each stands independently for an integer of 0, 1, 2, 3 or 4; n and m may be same or different; M is selected from null, —O—, —S— and —N(U), wherein U stands for hydrogen, C 1 , C 2 , C 3 , or C 4 alkyl; and D is a marker for diagnostics, or a drug to be targeted to PNOM-cells.