Inhibitory effect of a cyclic urea derivative on rubella virus replication.

1-(4-Morpholinomethyl)-tetrahydro-2(1H)-pyrimidinone (mopyridone) exhibited a marked activity against rubella virus (Judith and RA27/3 strains), a MIC50 value of 0.9 microM and selectivity ratio of 557.7 been found in the case of Judith strain. These data, in addition to the previous ones about its anti-alphavirus effects suggest the compound to be considered as a broad spectrum inhibitor of togavirus replication.