| 摘要 |
This invention relates to chemical products of general formula <IMAGE> wherein R is an amino group, mono or bi-hydroxyalkyl substituted, or a thio group, mono hydroxyalkyl substituted, in which one or more of the available -OH groups have been esterified with acids containing 2 to 18 carbon atoms. It is also described a process for the preparation of said products, which comprises reacting a corresponding starting compound, N or S-hydroxyalkyl substituted, with the chloride or the anhydride of the acid concerned. |
