Syntheses of Photochromic Dihetarylethenes - M.M. Krayushkin and M.A. Kalik The Chemistry of Pyrido[1.2-a]azepines and Their Hydro Derivatives - Gunther Fischer Synthesis, Structure, Chemical Reactivity and Practical Significance of 2-Amino-4H-pyrans - Anatoliy M. Shestopalov & Yuri M. Litvinov