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Muzychka, L. V.; Yaremchuk, I. O.; Smolii, O. B.; Zubatyuk, R. I.; Shishkin, O. V. The Synthesis of New pyrrolo[2,3-d]pyrimidine-Containing α-Hydroxyphosphonic Acids. J. Org. Pharm. Chem. 2016, 14, 58-62.