| 摘要 |
The invention relates to compounds of formula: <IMAGE> (I) in which m, n, p and q are equal to 0 or 1, p being different from q and the sum m+n+p+q being equal to 2, A denotes a nonionic chain arrangement chosen from the groups: -C2H4O-r and/or -C3H5(OH)O-s, in which r denotes a number which can assume all integral values between 0 and 5 or a statistical average value between 0 and 20, s denotes a number which can assume all integral values between 0 and 5 or a statistical average value between 0 and 10, u is equal to 0 to 1, with the restriction that when u=0, s and r are also zero, R denotes (i) a linear or branched hydrocarbon radical which has 1 to 32 carbon atoms and can contain one or more oxygen atoms in the chain or bear one or more OH groups or (ii) a (C8-C18 alkyl)phenyl radical. These compounds can be used for preparing stable chemical compounds, for conveying active substances or for forming vesicles. |
