摘要:
A compound of the formula ##STR1## wherein R.sub.1 is chlorine, bromine, fluorine or methyl;R.sub.2 and R.sub.3, which may be identical to or different from each other, are each hydrogen, chlorine or methyl;R.sub.4 is hydrogen, methyl or ethyl; andR.sub.5 and R.sub.6, which may be identical to or different from each other, are each methyl, ethyl or alkoxy-alkyl of 2 to 4 carbon atoms or, together with each other and the nitrogen atom to which they are attached, form a 5-, 6- or 7-membered heterocycle which may contain an additional heteroatom, such as pyrrolidino, piperidino, morpholino, piperazino or hexamethyleneimino;And non-toxic, pharmaceutically acceptable acid addition salts thereof; the compounds as well as the salts are useful as antithrombotics.