N.sup.2 -substituted-L-arginine esters and amides, and the pharmaceutically acceptable acid addition salts thereof have been found to be effective as pharmaceutical agents for the inhibition and suppression of thrombosis.
                            N.sup.2-取代-
L-精氨酸酯和酰胺,以及其药用酸盐被发现对抑制和抑制血栓形成具有有效作用。