2-PHENYL-AND 2-THIENYL-(2)-PIPERIDINE DERIVATIVES HAVING NEUROPROTECTIVE PROPERTIES

摘要

Compounds of formula (I) (I) in which R1 is hydrogen, R2 is hydrogen or C1-6 alkyl, R3 and R4 independently represent one or more radicals selected from hydrogen, NH2, NO2, halogen, hydroxy, C1-6 alkoxy or C1-6 alkyl, X represents S or -CH=CH- group and pharmaceutically acceptable salts are NMDA receptor antagonists.