Compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, and --N(R.sup.7)--CH(R.sup.8)(R.sup.9) are as claimed herein or their pharmaceutically acceptable acid addition salts inhibit proteases of viral origin and can be used as medicaments for the treatment of viral infections. They can be manufactured according to generally known procedures.
化合物的公式为##STR1##其中R.sup.1,R.sup.2,R.sup.3,R.sup.4,R.sup.5,R.sup.6和--N(R.sup.7)--CH(R.sup.8)(R.sup.9)如本文所述或其药学上可接受的酸盐,可以抑制病毒起源的
蛋白酶,并可用作治疗病毒感染的药物。它们可以按照通常已知的程序制造。