Alkoxy-substituted dihydrobenzopyran-2-carboxylic acids and derivatives thereof

A compound of the formula:

• ##STR40## wherein R represents alkyl having 2 to 6 carbon atoms, alkenyl having 2 to 6 carbon atoms, alkynyl having 2 to 6 carbon atoms, or --(CH.sub.2).sub.m --R.sup.3 wherein R.sup.3 represents cycloalkyl of 3 to 5 carbons atoms and m is 1 or 2;
• R.sup.1 represents alkyl having 1 to 4 carbon atoms;
• R.sup.2 represents hydrogen or alkyl having 1 to 5 carbon atoms;
• R.sup.4 represents alkyl having 1 to 6 carbon atoms;
• n is an integer from 1 to 5;
• p is an integer from 0 to 6;
• Y represents NH;
• and
• Z represents hydrogen, alkyl having 1 to 4 carbon atoms, alkoxy having 1 to 4 carbon atoms, NR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are independently hydrogen or alkyl having 1 to 4 carbon atoms, or SR.sup.6 wherein R.sup.6 is, hydrogen, benzyl or alkyl having 1 to 4 carbon atoms;
• and the stereoisomers and pharmaceutically acceptable salts thereof.