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1*Tonkikh N.N.; Strakov A.Ya.; Petrova M.V. Synthesis and reactions of 2-(4-pyridyl)-7,7-dimethyl-5-oxo-5,6,7,8-tetrahydroquinazoline. Chem. Heterocycl. Compd. 1998, 34(1), 92-95.      

2*Strakova I.A.; Delyatitskaya L.G.; Petrova M.V.; Strakov A.Ya. Synthesis and reactions of 1-(2-pyridyl)-3-methyl-4-chloro-5-formyl-6,7-dihydroindazoles. Chem. Heterocycl. Compd. 1998, 34(6), 669-673.      

3*Balodis K.A.; Meirovits I.A.; Petrova M.V. Oxazoles based on 2-amino-3-hydroxyphenalenone. Chem. Heterocycl. Compd. 1998, 34(8), 916-918.      

4*Strakova I.A.; Delyatitskaya L.G.; Petrova M.V.; Strakov A.Ya. Reactions of 3-methyl-1-(2-pyridyl)-4-chloro-5-formyl-6,7-dihydroindazole. Chem. Heterocycl. Compd. 1998, 34(9), 1036-1040.      

5*Ozola V.; Maurinsh Y.; Lidaka M. Synthesis of derivatives of 3-methylxanthine and 1-methyl-3- isobutylxanthine 7-β-D-ribofuranosides. Nucleosides Nucleotides 1998, 17(9-11), 1983-1986.      

6*Madre M.; Zhuk R.; Panchenko N.; Geenevasen J.; Van Den Burg A.; Koomen G.-J. Purine nucleoside analogues. 10. A new synthetic route to 8-substituted-7(9)-alkoxyalkylguanines. Heterocycl. Commun. 1998, 4(6), 581-586.      

7*Lukevits E.; Segal I.; Birgele I.; Zablotskaya A. Silyl modification of biologically active compounds. 5. Hydrolytic stability and biological activity of the trialkylsilyl derivatives of some heterocyclic bases. Chem. Heterocycl. Compd. 1998, 34(9), 1076-1080.      

8*Iovel' I.G.; Lukevics E. Hydroxymethylation and alkylation of compounds of the furan, thiophene, and pyrrole series in the presence of H+ cations (review). Chem. Heterocycl. Compd. 1998, 34(1), 1-12.      

9Iovel I.; Oehme G.; *Lukevics E. Catalytic Enantioselective Addition of Diethylzinc to (Hetero)Aromatic Aldehydes. Appl. Organomet. Chem. 1998, 12(7), 469-474.      

10*Anderson A.A.; Simonyan S.P.; Lukevics E. Mutual catalytic conversions of unsubstituted furan and pyran systems. Chem. Heterocycl. Compd. 1998, 34(12), 1406-1408.      

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