Patent ID: 8017649

Claim:
A compound of the general formula I: wherein: ═ denotes a single or double bond; and R 1 , R 2 , R 3 , R 4 , R 5 are independently selected from H, OH or a group according to formula (Ia): —O-L-D-E (Ia) wherein: O is oxygen; i) L is a C═O group, D is an alkylene group with a chain length equivalent to about 1 to 20 carbon atoms, and E is a substituted or unsubstituted carboxylic acid group; or ii) L and D are absent and E is an ester group according to formula (Ic): wherein: Q is a substituted or unsubstituted alkylene; W is O; and X is H, a substituted or unsubstituted alkyl, benzyl, or a mono- or divalent cationic salt, or an ammonium cationic salt; provided that at least one of R 1 , R 2 , R 3 , R 4 , R 5 is other than H or OH; with the proviso that the compound is not 3,3′,4′,7-Tetra-O-benzylquercetin 5-[1,4,5,6-tetra-O-benzyl-2-O-(dibenzyl-oxyphosphoryl)-myo-inositol 3-succinate]; 3′,4′,7-Tri-O -benzylquercetin 3-[1,4,5,6-tetra-O-benzyl-2-O-(dibenloxyphosphoryl) myo-inositol 3-succinate]; Quercetin 5-(2-O-phosphono-myo-inositol 1-succinate) and Quercetin 3-(2-O -phosphono-myo-inositol 1-succinate).