PIPERAZINE DERIVATIVES, MEDICAMENTS COMPRISING THESE COMPOUNDS, THEIR USE AND PROCESSES FOR THEIR PREPARATION

摘要

Piperazine derivatives have the general formula (I), in which Ra, Y1 to Y3 and E have the definitions given in the first claim. Also disclosed are their tautomers, their stereoisomers, including their mixtures and their salts, in particular their physiologically tolerable salts with inorganic or organic acids or bases, having valuable pharmacological properties, preferably aggregation-inhibiting effects, medicaments containing these compounds, their use and a process for preparing the same.