Patent ID: 7166605

Claim:
A compound of general formula (I) and/or salts thereof wherein X and X 1 are the same or different and are selected from hydrogen and a group of formula (II) (T) n —Y—NO 2 (II) with the proviso that X and X 1 cannot be both hydrogen, wherein n is an integer of from 0 to 1, where when n=1, T is the group (CO), Y is a bivalent radical having the following meanings: a) R 1 O, wherein R 1 is: straight or branched C 1 –C 20 -alkylene optionally containing one or more heteroatoms selected from the group consisting of oxygen, nitrogen and sulfur, or one or more groups —O(CO)—, —NH(CO)—, —S(CO)—, optionally substituted with one or more of the following: —OH, —SH, —NH 2 , —NHCOR 2 , where R 2 is straight or branched C 1 –C 10 -alkyl; cycloalkylene with from 5 to 7 carbon atoms in the ring, where one or more carbon atoms can be replaced by heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur, and the ring can be substituted with side chains R 2 , R 2 being defined as above; wherein n3 is an integer of from 0 to 20, and n3′ is an integer of from 1 to 20, wherein m is an integer of from 1 to 6, Rf is hydrogen or CH 3 wherein: nIX is an integer of from 0 to 10; nIIX is an integer of from 1 to 10; R TIX , R TIX′ , R TIIX , R TIIX′ are the same or different and are H or straight or branched C 1 –C 4 alkyl; Y 3 is a 5 or 6-membered heterocyclic saturated, unsaturated or aromatic ring containing one or more heteroatoms selected from the group consisting of nitrogen, oxygen and sulfur.