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19 is- sustanza attiva, levetiracetam hija derivattiva ta 'pyrrolidone (s- enantiomer ta ’ α- ethyl- 2- oxo- 1 - pyrrolidine acetamide), u ma jixbahx kimikament lil sustanzi attivi oħrajn li jintużaw kontra l - epilessija.
the active substance, levetiracetam, is a pyrrolidone derivative (s-enantiomer of α -ethyl-2-oxo-1- pyrrolidine acetamide), chemically unrelated to existing antiepileptic active substances.