Lipid derivatives

A compound represented by the formula:

• ##STR289## wherein R.sub.1 is alkyl or alkylcarbamoyl;
• R.sub.2 is lower alkyloxy, lower alkylcarbamoyloxy, lower alkylcarbonylamino, lower alkyloxycarbonylamino, lower alkylureido, lower alkyloxymethyl, lower alkylcarbonylmethyl, cyanomethyl, a 5-membered heterocyclic group, or a 5-membered heterocyclyloxy group, wherein one or more N, O or S heteroatoms are present;
• R.sub.2 ' is hydrogen or taken together with R.sub.2 forms --O(CH.sub.2).sub.m -- wherein m is an integer of 1 to 5;
• R.sub.3, R.sub.4, and R.sub.5 taken together with the adjacent nitrogen atom form quinolinio or isoquinolinio which are unsubstituted or substituted by a member selected from the group consisting of lower alkyl, carboxyl, lower alyloxycarbonyl, hydroxy, lower alkyloxy, acyloxy, lower alkylamino, amino, carbamoyl and ureido;
• R.sub.6 is hydrogen or lower alkylcarbonyl;
• X.sup.- is a pharmaceutically acceptable anion;
• Y is oxygen or sulfur;
• and n is an integer of 1 to 10.