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![Hydrazinecarboxylic acid, [(1,4-dioxido-2-quinoxalinyl)methylene]-,methyl ester](http://www.phscientific.com/cdn/shop/products/Angene_logo_81dd6291-2382-4ef2-a54b-a70b03bc219f_{width}x.jpg?v=1615477773) 
                      
                    ![Hydrazinecarboxylic acid, [(1,4-dioxido-2-quinoxalinyl)methylene]-,methyl ester](http://www.phscientific.com/cdn/shop/products/Angene_logo_81dd6291-2382-4ef2-a54b-a70b03bc219f_130x.jpg?v=1615477773) 
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