Patent ID: 7169803

Claim:
A compound having the general Formula I wherein the wavy bond represents the racemate, the (R)-enantiomer or the (S)-enantiomer; A and B are independently C 1-4 alkyl or a direct bond; D is H or CH 3 ; X is O, CH 2 , phenyl or (NR 1 ) r ; Q and Z are each independently H, SO 3 H, NR 1 R 2 , NR 1 —CH 2 CH 2 —NR 1 R 2 , —C(O)OH, OH, OCH 2 C(O)OH, C(O)OCH 2 CO(O)H, C(O)NR 1 CH 2 CH 2 SO 3 H, phenyl, piperdinyl, piperizinyl, methylpiperizinyl, morpholinyl, or tetrazol-5-yl; m, n, p, q, r are each independently an integer of 0 or 1; and R 1 , R 2 , and R 3 are each independently H or C 1-4 alkyl; or a nontoxic pharmaceutically acceptable salt or solvate thereof.