Plieninger
Chemische Berichte, 1950 , vol. 83, p. 271
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Kurihara et al.
J.Tohoku Coll.Pharm.Chem.Abstr., 1956 , # 3 p. 77,80
J.Tohoku Coll.Pharm.Chem.Abstr., 1957 , p. 5698
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Plieninger
Chemische Berichte, 1950 , vol. 83, p. 271
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Wagner et al.
Journal of the American Chemical Society, 1955 , vol. 77, p. 5140,5142