Patent ID: 7288262

Claim:
A compound of formula (I): wherein: R, which may be identical or different, are each chosen from hydrogen atoms and linear and branched, saturated hydrocarbons comprising 1 to 6 carbon atoms; Y, which may be identical or different, are each chosen from —CO—S—R′ groups, —CO—NHR′ groups, NH—COR′ groups and —S—COR′ groups, wherein R′, which may be identical or different, are each chosen from hydrogen atoms, aryl groups, optionally substituted with at least one hydrocarbon comprising 1 to 22 carbon atoms, wherein said hydrocarbon is chosen from linear and branched, saturated and unsaturated hydrocarbons, and linear, branched and cyclic, saturated and unsaturated hydrocarbons comprising 1 to 22 carbon atoms; wherein at least one of said R′ groups is chosen from linear and branched, unsaturated hydrocarbons comprising 2 to 22 carbon atoms and one C═C double bond.