+++статьи по имидазопиразолу

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Добрый вечер!
Буду весьма благодарен, если поможете скачать следующие статьи:
1. Ethyl 6-methylsulfanyl-2-phenyl-1H-imidazo[1,2-b]pyrazole-7-carboxylate monohydrate
T. Shao, G. Zhao and J. Wang
Acta Cryst., 2009, Volume 65, Part 4

DOI:

http://dx.doi.org/10.1107/S1600536809010988

2. 2,3-Dihydro-1H-imidazo[1,2-b]pyrazole: A new inhibitor of deoxyribonucleic acid synthesis
Herbert L. Ennis, Lotti Möller, Jaw J. Wang and Oleg S. Selawry
Biochemical Pharmacology
Volume 20, Issue 10, October 1971, Pages 2639-2646

DOI:

http://dx.doi.org/10.1016/0006-2952(71)90173-0

3. Reactions with heterocyclic amidines (V). Synthesis of some new imidazo[1,2-b] pyrazole, pyrazolo [5,1-c]-1,2,4-triazine and pyrazolo [5,1-c]-1,2,4-triazole derivatives
Abdel Ghani Ali Elagamey, Salah Zaki Ahmed Sowellim and Mohamed Nabil Khodeir
Archives of Pharmacal Research, Volume 10, Number 1 / Март 1987 г.

DOI:

http://dx.doi.org/10.1007/BF02855615

4. Synthesis and tautomeric structure of 3,7-bis(arylazo)-6-methyl-2-phenyl-1H-imidazo[1,2-b]pyrazoles in ground and excited states
Ahmad Sami Shawali, Mosselhi A. Mosselhi, Farag M.A. Altablawy, Thoraya A. Farghaly and Nagla M. Tawfik
Tetrahedron Volume 64, Issue 23, 2 June 2008, Pages 5524-5530

DOI:

http://dx.doi.org/10.1016/S0040-4020(02)00157-6

5. Bicyclic 5-5 Systems with One Bridgehead (Ring Junction) Nitrogen Atom: Two Extra Heteroatoms 1:1
C. Ollivier
Comprehensive Heterocyclic Chemistry III Volume 11, Pages 133-197

DOI:

http://dx.doi.org/10.1016/B978-008044992-0.01004-X

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Спасибо!