Patent ID: 7981920

Claim:
A compound selected from those of formula (I): (A) m ·(B) n (I) wherein A represents B represents a compound selected from those of formula (III): X-(Ak 1 ) x -(Y) y -(Ak 2 ) z -Z (III) wherein: X represents a CO 2 H, SO 3 H or P(O)(OH) 2 group, Ak 1 and Ak 2 , which may be identical or different, each represents a saturated or unsaturated, linear or branched C 1 -C 8 alkylene group in which one or more of the carbon atoms may be replaced by an oxygen, sulphur or nitrogen atom or by an SO 2 group, and wherein the alkylene group is optionally substituted by one or more groups selected from CO 2 H, SO 3 H, hydroxy and amino, x, y and z, which may be identical or different, each represents 0 or 1, Y represents CO or CONH, and Z represents an NO donor group, m represents the number of acid functions of B that have been converted to a salt and n represents the number of basic functions of A that have been converted to a salt, and wherein the bond or bonds between A and B are of the ionic type.