ChemInform Abstract: 4, 6‐Diacetylresorcinol in Heterocyclic Synthesis. Part 1. Synthesis and Biological Evaluation of Some New Linearly and Angularly Substituted Pyrano[3, 2‐g]chromenes via Vilsmeier—Haack Formylation of 4, 6‐Diacetylresorcinol, Its Schiff Bases, and Hydrazones. Issue 9 (4th March 2014)