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SMILES: c1c[nH][13c](=O)[nH]c1=O Canonical SMILES: O=c1cc[nH][13c](=O)[nH]1 InChI: InChI=1S/C4H4N2O2/c7-3-1-2-5-4(8)6-3/h1-2H,(H2,5,6,7,8)/i4+1 InChIKey: ISAKRJDGNUQOIC-AZXPZELESA-N
CBID:147896 http://www.chembase.cn/molecule-147896.html