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Communication | Special issue | Vol 47, No. 2, 1998, pp.661-664
Published online, 1st January, 1970
DOI: 10.3987/COM-97-S(N)90
Tautomerism of Clitidine, a Pyridine Nucleoside from the Poisonous Mushroom Clitocybe acromelalga

Haruhisa Shirahama,* Hiroyuki Koshino, Jun Uzawa, Kimiaki Yamano, Katsuhiro Konno, and Kazumi Nakatsu

*School of Science, Kwansei Gakuin University, 1-1-155 Uegahara, Nishinomiya 662-8501, Japan


Tautomerism of clitidine (1a), a toxic pyridine nucleoside from the poisonous mushroom Clirocybe acromelalga, was investigated by 15N NMR spectroscopy in aqueous solution and by X-Ray crystallographic analysis in the solid state, which showed the tautomer (1d) to be predominant in both states.