ChemInform Abstract: Non‐catalytic Multicomponent Rapid and Efficient Approach to 10‐(2, 4, 6‐Trioxohexahydropyrimidin‐5‐yl) ‐3, 3‐dimethyl‐2, 3, 4, 9‐tetrahydro‐1H‐xanthen‐1‐ones from Salicylaldehydes, Dimedone, and Barbituric Acids. Issue 14 (March 2016)