N-PHENYLALANYL AND N-PHENYLGLYCYL DERIVATIVES OF THE DIPEPTIDE OF L-AZETIDINE-2-CARBOXYLIC ACID AND L-ARGININE ALDEHYDE; ANTI-BLOOD CLOTTING COMPOSITIONS

摘要

Thrombin inhibitors represented by the formula CHEM as provided wherein A is e.g. phenylglycyl, and phenylalanyl, a-methylphenylalanine and a-methylphenylglycine wherein the amino group is preferably substituted with lower alkyl alkanoyl or lower alkoxycarbonyl, or a bicyclo group e.g. 1,2,3,4-tetrahydroisoquinolin-1-yl. Also provided are a method for inhibiting clot formation in man and animals, pharmaceutical formulations useful in the method and intermediates for the inhibitors.