著者所属：Department of Chemistry, Faculty of Science, Hokkaido University Department of Chemistry, Faculty of Science, Hokkaido University Department of Chemistry, Faculty of Science, Hokkaido University Faculty of Pharmaceutical Sciences, University of Tokyo Pharmaceutical Institute, School of Medicine, Keio University Pharmaceutical Institute, School of Medicine, Keio University Pharmaceutical Institute, School of Medicine, Keio University Pharmaceutical Institute, School of Medicine, Keio University Pharmaceutical Institute, School of Medicine, Keio University Pharmaceutical Institute, School of Medicine, Keio University
The half-chair and half-boat conformations observed by X-ray analysis for the A-ring of 2α- and 2β-chloro-1, 2-dihydro-1-α-santonin 1, respecitvely, should be regarded as a deformed sofa conformation based on molecular mechanics.
