ON SECONDARY PATENTING OF ORGANIC COMPOUNDS SUITABLE FOR USE AS ACTIVE PHARMACEUTICAL INGREDIENTS Article Goizman M.S., Shimanovskii N.L., Zotova O.A., Ryzhkov I.O., Popova A.O., Chernobrovkin M.G., Korlyukov A.A., Suponitskii K.Y., Sinel’nikov A.V. Pharmaceutical Chemistry Journal. Vol. 53. 2019. P. 876-882