A complex formed of at least one molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or a derivative covalently bonded with at least one hydrocarbon radical with formula (A) as follows: wherein: &bull；-m 1=1, 2, 3, 4, 5 or 6； &bull；-m 2=0, 1, 2, 3, 4, 5 or 6； and represents the site of the bond with the molecule of 5-(1,2-dihydroxy-ethyl)-3,4-dihydroxy-5H-furan-2-one or derivative. Formula (I)Complexe forme d'au moins une molecule de 5-(l,2-dihydroxy-ethyl) -3,4-dihydroxy-5H-furan-2-one ou derive liee de maniere covalente a au moins un radical hydrocarbone de formule (A) comme suit : dans laquelle : . - m i = 1, 2, 3, 4, 5 ou 6； . - m 2 = 0, 1, 2, 3, 4, 5 ou 6； et represente le site de liaison a la molecule de 5-(l,2-dihydroxy-ethyl) -3,4-dihydroxy-5H-furan-2-one ou derive. Formule (I)
