The present invention relates to a compound of formula (3Z 5S) 5 (hydroxymethyl) 1 [(2 methyl 1 1 biphenyl 4 yl)carbonyl]pyrrolidin 3 one O meth19243yloxime and/or an active metabolite thereof having antagonist action at the oxytocin receptor and/or vasopressin V1a receptor to processes for their preparation pharmaceutical compositions containing them and their use.