SCHEDULED MAINTENANCE
The products from the reaction of dimethyl acetylenedicarboxylate with acetylguanidine and guanidine, originally formulated as the pyrimidines (IIa) and (IIb), have been shown to the imidazoline derivatives (IIIa) and (IIIb).
A. S. Katner and E. A. Ziege, J. Chem. Soc. D, 1971, 864 DOI: 10.1039/C29710000864
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