Patent ID: 7858665

Claim:
Nitrooxyderivatives or salts thereof of formula (I) R—NR 1c (K) k0 —(B) b0 —(C) c0 —NO 2 (I) wherein c0 is 1; b0 is 0; k0 is 1; R 1c is H; K is the bivalent radical (1C) of the formula: R t and R′ t , same or different, are H, C 1 -C 10 -alkyl, phenyl or benzyl, —COOR y , in which R y =H, C 1 -C 10 -alkyl, phenyl, or benzyl; C=bivalent radical of formula -T c -Y wherein T c =(CO); Y is an alkylenoxy group —R′O— in which R′ is straight or branched C 1 -C 20 or a cycloalkylene with from 5 to 7 carbon atoms; wherein n3 is an integer from 0 to 5 and n3′ is an integer from 1 to 3; R is the radical of an analgesic drug of formula (II): wherein: W is a carbon atom; m is 1; R 0 =—(CH 2 ) n —COOR y , wherein R y =H, C 1 -C 10 -alkyl, phenyl, or benzyl; n is an integer of from 0 to 2; R 1 =H; R 2 is: a radical of formula (IIA), wherein optionally an ethylenic unsaturation may be present between the carbon atoms in position 1 and 2: wherein: p, p 1 , p 2 are 0; p 3 is 0; R 4 is hydrogen; R 5 is hydrogen or a straight or branched C 1 -C 6 -alkyl, Q is straight or branched C 1 -C 6 -alkyl; or in formula (II) R 2 and R 1 with W together form a C 4 -C 10 saturated or unsaturated ring.