166520-74-7 2h-1-benzopyran-6-sulfonic acid, 2-oxo-, ethylidenehydrazide

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Product Name	2H-1-Benzopyran-6-sulfonic acid, 2-oxo-, ethylidenehydrazide
CAS No.	166520-74-7
Molecular Formula	C₁₁H₁₀N₂O₄S

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