Page 1. Chemistry of Heterocyclic Compounds, Vol. 46, No. 9, 2010 ... 7 Ph2O The chemical behavior of compound 3d clearly shows that it has an acid structure and is not the isomeric amide 2d. ... Pharm., 299, 362 (1966). 11. Syntheses of Heterocyclic Compounds, [in Russian] No. ...