Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Saito Katsuhiro and Watanabe Tetsuya and Takahashi Kensuke,[4+2]-Type Cycloadditions of Tropone and Heptafulvene Derivatives with a Tautomeric Mixture of Cycloheptatrienylidene and Cycloheptatetraene,Chemistry Letters,0366-7022,The Chemical Society of Japan,1989,18,12,2099-2102,https://cir.nii.ac.jp/crid/1390282679558028800,https://doi.org/10.1246/cl.1989.2099