| abstract |
1. Compounds of the formula see diagramm : EP0000330,P30,F1 wherein R1 and R2 each represent a saturated or unsaturated aliphatic or mixed aliphatic-cycloaliphatic hydrocarbon radical which has 11-21 C atoms and which is also optionally substituted by oxygen functions, R3 represents hydrogen or the radical R1 -CO-O-CH2 -, where R1 has the same meaning, and X represents a natural aliphatic amino acid linked by a peptide bond and having a free, esterified or amidated carboxyl group, or an amino acid sequence of 2-10 natural aliphatic amino acids, the terminal carboxyl group of which is free or in the ester or amide form, with the asymmetric centres denoted by * and ** possessing the absolute R- and S- or R-configurations, respectively ; and, possibly, mixtures of the R- and S-compounds epimeric on the C** atoms, and salts and complexes of all these compounds.n[EP0000330A1] |