Patent ID: 8334377

Claim:
A compound having Formula III or a pharmaceutically acceptable base or acid addition salt, hydrate, ester, solvate, stereoisomer, or mixtures thereof, wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , or R 8 is CH 2 CH 2 OCH 2 CH 2 OCH 3 or CH 2 COO − , the remaining R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , or R 8 are hydrogen, L 1 and L 2 are, independently, absent, halide, oxo, OH 2 , hydroxo, CN, OPO 3 H or alcohol; and M is Fe.