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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*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.      

3*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.      

4Liepinsh E.; *Otting G.; Kitamura M.; Murakami T.; Nakaya T. Common ancestor of serine proteases and flavin-binding domains. Nat. Struct. Biol. 1998, 5(2), 102-103.      

5Kovalenko L.; Madre M.; Lindau S.; Bohley C.; Panchenko N.; Meister W.-V.; Zhuk R.; *Hoffmann S. Chemical synthesis and properties of long-chain alkoxymethyl-nucleobase derivatives. Nucleosides Nucleotides 1998, 17(9-11), 1813-1821.      

6*Slavinskaya V.A.; Sile D.E.; Katkevich M.Yu.; Korchagova E.Kh.; Panchenko N.G.; Lipsbergs I.U.; Lukevics E. Hydrogenation of 4-(2-furyl)-2-oxobutenoic acid sodium salt on Raney nickel. Chem. Heterocycl. Compd. 1998, 34(1), 35-39.      

7Pugovičs O.; Kauss V.; *Kalvinsh I.; Gold M.R. The synthesis of (3,5-di-tert-butyl-4-hydroxyphenyl) methyl-(3- pyridylalkyl)ethers via 1-(3,5-di-tert-butyl-4-hydroxyphenyl)methyl pyridinium salts. Synth. Commun. 1998, 28(12), 2227-2236.      

8*Rozhkov E.; Piskunova I.; Gol'd M.; Kalvin'sh I. Cyclic hydrazides 1. Synthesis of 4-hydroxy-1-oxo-1,2-dihydropyridazino[4,5-b]quinolines. Chem. Heterocycl. Compd. 1998, 34(1), 77-91.      

9*Veinberg G.; Shestakova I.; Grigan N.; Musel D.; Kaņepe I.; Domrachova I.; Grigoryeva V.; Zharkova O.; Turovskis I.; Kalvinsh I.; Strakovs A.; Lukevics E. New biological properties of tert-butyl cephalosporanate sulfones. Eur. J. Med. Chem. 1998, 33(10), 755-762.      

10*Bobrova I.; Abissova N.; Mishlakova N.; Rozentals G.; Chipens G. Synthesis and biological activity of branched enkephalin analogues. Eur. J. Med. Chem. 1998, 33(4), 255-266.      

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