Synthesis of some new benzimidazole-5(6)-carboxylic acids
Hakan Göker, Süreyya Ölgen, Rahmiye Ertand, HÜLya Akgün, Süheyla Özbey, Engin Kendi, GÜL Topçu
Journal of Heterocyclic Chemistry
Volume 32 Issue 6, Pages 1767 - 1773
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http://dx.doi.org/10.1002/jhet.5570320617Заранее спасибо!