The invention relates to novel compounds of formula Iwhere R1, R2, R3, R4, R5, R6, R7, R8, R9, Q1, Q2 and Q3 are each as defined below. The compounds of formula I have antithrombotic activity and inhibit especially protease-activated receptor 1 (PAR1). The invention further relates to a process for preparing the compound of formula I and to the use thereof as a medicament.