On the stereochemistry of the synthesis of 1-(2-cyano-2-methoxyiminoacetyl)-3-ethylurea and its E-configuration crystal structure

The synthesis of 1-(2-cyano-2-methoxyiminoacetyl)-3-ethylurea leads to only one of the two possible diastereomers, which has been found to be in the E-configuration by X-ray analysis.