Thiazoline acid derivatives

A compound of the formula:

• ##STR16## wherein:
• R may be H or acyl;
• R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.7 may be the same or different and represent H, alkyl or hydrocarbyl arylalkyl having up to 14 carbon atoms, or ##STR17## wherein x is 1-10 and y is 0-10;
• R.sub.5 is H, alkyl having up to 15 carbon atoms, ##STR18## wherein x is 1-10 and y is 0-10, or ##STR19## wherein R.sub.1 is as defined above, z is 1-10 and q is 0-5;
• R.sub.6 is H or acyl;
• n is 0-10;
• a salt thereof with a pharmaceutically acceptable acid, or a pharmaceutically acceptable complex thereof.