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11Strakovs A.; Petrova M.V.; Tonkih N.N.; Brooks E.E.; Biehle S.J.; *Kreishman G.P. An NMR study of the kinetics of 1,4-N,N'-migration of the acyl group vinylogs on aromatic 1,2-diamines. J. Org. Chem. 1999, 64(4), 1426-1428.      

12*Strakov A.Ya.; Petrova M.V.; Gurkovskii A.I.; Neiland O.Ya. Reaction of 2-formyl-1,3-cyclanediones with N,N′-substituted 1,1-diamino-2-nitroethylenes. Chem. Heterocycl. Compd. 1999, 35(3), 286-289.      

13*Kazoka H. High-performance liquid chromatography of some purine and pyrimidine derivatives on silica in hexane-isopropanol-ethylene glycol mobile phases. J. Chromatogr. A 1999, 836(2), 235-244.      

14*Veinberg G.; Vorona M.; Musel D.; Grigan N.; Lukevics E. Preparation of tert-butyl 6-aminopenicillanate and its 6-oxo and 6- diazo derivatives. J. Chem. Res. Part S 1999(4), 270-271.      

15*Krauze A.; Duburs G. Synthesis of 6-alkylthio-5-carbamoyl-3-cyano-4-phenyl-3,4-dihydropyridin-2(1H)-ones. Chem. Heterocycl. Compd. 1999, 35(4), 446-449.      

16*Belyakov S.; Ignatovich L.; Lukevics E. Concerning the transannular bond in silatranes and germatranes: A quantum chemical study. J. Organomet. Chem. 1999, 577(2), 205-210.      

17*Gavars R.; Baumane L.; Stradiņš J.; Vigante B.; Ozols J.; Duburs G. EPR spectra of free radicals generated by electrochemical reduction of 3-nitrohexahydroquinol-5-ones and 4-nitrohexahydroisoquinol-8-ones. Chem. Heterocycl. Compd. 1999, 35(4), 450-454.      

18Starchenkov I.B.; Andrianov V.G.; Mishnev A.F. The chemistry of furazano-[3,4-b]pyrazine. 7. Properties of 5,6-diamino- and 5,6-dihydrazinofurazano[3,4-b]pyrazine. Chem. Heterocycl. Compd. 1999, 35(4), 499-508.      

19*Ābele E.; Abele R.; Popelis Yu.; Mazheika I.; Lukevics E. Alkylation of hetaryl methyl ketones by propargyl bromide under phase-transfer catalysis conditions. Chem. Heterocycl. Compd. 1999, 35(4), 436-438.      

20*Gurkovskii A.I.; Tonkikh N.N.; Petrova M.V.; Strakov A.Ya. 3-Acyl-1,5-benzodiazepines in the reactions of 5,5-dimethyl-2-formylcyclohexane-1,3-dione with certain 1,2-diaminobenzenes. Chem. Heterocycl. Compd. 1999, 35(5), 625-629.      

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