Synthesis of Nitrogen-Containing Derivatives of (18α,19β)-19-Hydroxy-2,3-secooleanane-2,3,28-trioic Acid 28,19-Lactone von Shernyukov, Andrey V., Mainagashev, Ilya Ya, Korchagina, Dina V., Genaev, Alexander M., Komarova, Nina I., Salakhutdinov, Nariman F., Tolstikov, Genrikh A.

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17O N.M.R. studies of enol and phenol compounds with intramolecular hydrogen bonds von LAPACHEV, V. V, MAINAGASHEV, I. YA, STEKHOVA, S. A, FEDOTOV, M. A, KRIVOPALOV, V. P, MAMAEV, V. P

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