Patent ID: 7375135

Claim:
A compound represented by general formula (I): wherein G represents an oxygen atom or a sulfur atom, R1, R2 and R3, which are the same or different, represent (i) a hydrogen atom, (ii) a CO—R group in which R a linear or branched alkyl group, saturated or not, optionally substituted, the main chain of which contains from 1 to 25 carbon atoms, or (iii) a group having the formula CO—(CH 2 ) 2n+1— X—R′ in which X is a sulfur atom, a selenium atom, an SO group or an SO 2 group, n is a whole number comprised between 0 and 11, and R′ a linear or branched alkyl group, saturated or not, optionally substituted, the main chain of which contains from 13 to 23 carbon atoms and optionally one or more heterogroups selected in the group consisting of an oxygen atom, a sulfur atom, a selenium atom, an SO group and an SO 2 group, wherein at least one of the groups R1, R2 and R3 is a group having the formula CO—(CH 2 ) 2n+1 —X—R′ such as defined hereinabove.