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M. V. Rubtsov and A. G. Baichikov, Synthetic Pharmaceutical Chemical Preparations [in Russian], Meditsina, Moscow (1971), p. 285.
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Translated from Khimiko-Farmatsevticheskii Zhurnal, Vol. 9, No. 7, p. 48, July, 1975.
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Likhacheva, V.M., Zaloznaya, N.G. & Maevskaya, G.T. Improvements to the method of obtaining theobromine from 3-methylxanthine potassium salt. Pharm Chem J 9, 466 (1975). https://doi.org/10.1007/BF00759357
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DOI: https://doi.org/10.1007/BF00759357