| abstract |
D, L-, L- and D-phenyl alanine derivatives of formula (I) defined in claim 1 in which R1 is an amidino-, guanidino-, oxamidino-, aminomethyl- or amino group have been discovered which effectively prevent blood coagulation or thrombosis. The antithrombotically active compounds have low toxicity and may be administered by mouth, subcutaneously or intravenously. |