PURPOSE: Oxazoleacetic acid amide I[R is II or III(X and Z are halogen; Y is H, halogen or lower alkoxy); R1 is lower alkyl; R2 is H or lower alkyl; R3 and R4 are H, (hydroxy)lower alkyl, di-lower-alkylamino lower alkyl, benzyl or cycloalkyl; R3 and R4 together with the adjacent N form a heterocyclic ring], e.g. 2-(4-chlorophenyl)-5-ethoxy-4-oxazoleacetamide.