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methyl 1H-pyrrole-3-carboxylate
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![imidazo[1,2-a]pyridin-5-amine](http://img.iapply.cn/6c2d7d1210c3adddfd427ce25c543f16)
imidazo[1,2-a]pyridin-5-amine
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![ethyl 6-chloro-2,8-dimethylimidazo[1,2-b]pyridazine-3-carboxylate](http://img.iapply.cn/0734d6c3f12f17554b6cf52204927e19)
ethyl 6-chloro-2,8-dimethylimidazo[1,2-b]pyridazine-3-carboxylate
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![ethyl 5-methyl-4-oxo-1,4-dihydropyrrolo[2,1-f][1,2,4]triazine-6-carboxylate](http://img.iapply.cn/28ad6fafba5bbba674ceb44a8e0b019c)
ethyl 5-methyl-4-oxo-1,4-dihydropyrrolo[2,1-f][1,2,4]triazine-6-carboxylate
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![ethyl 5-chloropyrazolo[1,5-a]pyrimidine-3-carboxylate](http://img.iapply.cn/0854ccc13b287c78753c22e4e455cc55)
ethyl 5-chloropyrazolo[1,5-a]pyrimidine-3-carboxylate
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![ethyl 5-chloro-6-fluoropyrazolo[1,5-a]pyrimidine-3-carboxylate](http://img.iapply.cn/f8cdc623b9fc8fcbbbf8db090a2fc1b0)
ethyl 5-chloro-6-fluoropyrazolo[1,5-a]pyrimidine-3-carboxylate
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Ethyl 4-formylpyrrole-2-carboxylate
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Ethyl 3-methylisoxazole-5-carboxylate
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ethyl (3,5-dibromopyrazin-2-yl)glycinate
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![benzyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(1H)-carboxylate](http://img.iapply.cn/1186635d375c822b6ec92843f0d21dd9)
benzyl 4,6-dihydropyrrolo[3,4-c]pyrazole-5(1H)-carboxylate
