Compositions containing a mixture of phosphorous compounds and alkylglycerols

A compound of the formula

• R-Y-P⊖2-X-R1 (I′)
• wherein R is a saturated or unsaturated hydrocarbon radical of 12 to 24 carbon atoms which may also be halogen-substituted,
• X is oxygen, -NH or -NR2-,
• Y is oxygen or -NH-,
• R1 is C1-C8-alkyl, unsaturated C3-C8-alkyl, optionally unsaturated C3-C8-alkyl which is substituted with halogen, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, tri-C1-C6-alkylamino, hydroxyl, carboxyl, C3-C8-cycloalkyl or phenyl, C2-alkyl which is substituted with hydrogen, hydroxyl, carboxyl, C3-C8-cycloalkyl or phenyl;
• unsaturated C2-alkyl which is substituted with di-C1-C6-alkylamino, tri-C1-C6-alkylamino, C3-C8-cycloalkyl orphenyl;
• C2-alkyl which is substituted with amino, C1-C6-alkylamino, di-C1-C6-alkylamino or tri-C1-C6-alkylamino when X is oxygen, -NH- or -NR2- and Y is -NH-, or when X is -NH- or -NR2-, Y is oxygen and R has the meanings previously defined;
• 2-tert. -butoxycarbonyl-aminoethyl, 2-tert.-butoxycarbonylethyl, 2,3-isopropylidenedioxy-propyl-(1), 2,3-dibenzyloxypropyl-(1), 1,3-disbenzyloxypropyl-(2) or N-C1-C6-alkylamino-C2-C6-alkyl when X is oxygen and Y and R have the meanings previously defined;
• 2,3-dihydroxypropyl-(1) when X is -NH- and Y and R have the meanings previously defined;
• and
• R2 is 2,3-dihydroxypropyl-(1), C1-C8-alkyl or C2-C8-alkyl which is unsaturated and/or substituted with halogen, amino, C1-C6-alkylamino, di-C1-C6-alkylamino, tri-C1-C6-alkylamino, hydroxyl, carboxyl, C3-C8-cycloalkyl or phenyl;
• and physiologically acceptable salts thereof.