(4) JA VanAllan, J. Ow. Chem., 21, 24, 193 (1956). acetate or on a basic ion-exchange column is also evidence against structure I for this adduct, especially in view of the fact that I1 hydrochloride could be hydrolyzed to VI in the presence of aqueous sodium acetate. Stephen and Wilson5 claimed to have prepared 11, melting at l59O1 by refluxing ethylenethiourea with ethyl chloroacetate in pyridine. We were unable to repeat this ...