| 摘要 |
The present invention relates to a compound of formula (I): in which: - the R1 and R2 groups, which may be identical or different, are, independently of one another, a saturated or unsaturated, linear, branched or cyclic hydrocarbon group comprising from 1 to 15 carbon atoms, preferably from 1 to 10 carbon atoms; - the R3 and R4 groups, which may be identical or different, are chosen, independently of one another, from a hydrogen atom, the methyl group and the ethyl group; - the R, R6 and R7 groups, which may be identical or different, are chosen, independently of one another, from a hydrogen atom and an alkyl group comprising from 1 to 6 carbon atoms, preferably from 1 to 4 carbon atoms, more preferably from 1 to 3 carbon atoms; - n is an integer of 0 to 20; and - m is an integer of 1 to 6. |
