| abstract |
Compounds or their salts of general formula (I): A-B—N(O) s wherein: s is an integer equal to 1 or 2; A=R-T 1 -, wherein R is the drug radical and T 1 =(CO) t or (X) t′ , wherein X=O, S, NR 1c , R 1c is H or a linear or branched alkyl or a free valence, t and t′ are integers and equal to zero or 1, with the proviso that t=1 when t′=0; t=0 when t′=1; B=-T B -X 2 —O— wherein T B =(CO) when t=0, T B =X when t′=0, X being as above defined; X 2 is equal to R 1B —X—R 2B radical wherein X is as above defined, R 1B and R 2B , equal to or different from each other, are linear or branched C 1 -C 6 alkylenes, or X 2 is a radical wherein two alkylene chains C 1 -C 4 are linked to nonadjacent positions of a central ring having 4 or 6 atoms, said ring being an unsaturated cycloaliphatic ring, or a saturated or aromatic heterocylic ring, containing one or two heteroatoms, equal or different, selected from O, S, N; wherein the unsaturated cycloaliphatic ring does not have aromatic character according to Huckel's rule. |