| abstract |
The invention relates to compounds of formula: ##STR1## 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: n n --C.sub.2 H.sub.4 O--.sub.r n n and/or n n --C.sub.3 H.sub.5 (OH)O--.sub.s, n n 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, n s denotes a number which can assume all integral values between 0 and 5 or a statistical average value between 0 and 10, n u is equal to 0 or 1, with the restriction that when u=0, s and r are also zero, n R denotes n (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 n (ii) a (C 8 -C 18 alkyl)phenyl radical. n These compounds can be used for preparing stable chemical compounds, for conveying active substances or for forming vesicles. |