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基于 PubChem CID 索引，支持名称 / 同义词 / CAS / SMILES 检索。
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1H-Indolium, 2-carboxy-1-((2,6-dicarboxy-2,3-dihydro-4(1H)-pyridinylidene)ethylidene)-5,6-dihydroxy-, hydroxide, inner salt, sulfate (salt) CAS 37717-82-1 PubChem CID 6434233
O=C(O)C1=C/C(=C/C=[N+]2C(C(=O)O)=Cc3cc(O)c(O)cc32)CC(C(=O)[O-])[NH2+]1.O=S(=O)([O-])O -
1-[2-(2,6-Dicarboxy-2,3-dihydropyridin-4(1H)-ylidene)ethylidene]-2-(dihydroxymethylidene)-6-oxo-2,6-dihydro-1H-indol-1-ium-5-olate--sulfuric acid (1/1) CAS 37717-82-1 PubChem CID 138399331
O=C(O)C1=NC(C(=O)O)CC(/C=C/n2c(C(=O)O)cc3cc(O)c(O)cc32)=C1.O=S(=O)(O)O