ChemInform Abstract: A Study on the Scope of the Photochemical Ring Contraction of Substituted 2‐Amino‐3‐cyano‐4H‐pyrans to Cyclobutenes: Crystal Structure of 3‐Carbamoyl‐3‐cyano‐1‐ethoxycarbonyl‐4‐isopropyl‐2‐phenylcyclobutene. | Publicación