| 1 | 2134-91-0 | 5-CARBOXYVANILLIC ACID | 5-CARBOXYVANILLIC ACID | C9H8O6
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| 2 | 1344087-47-3 | 软毛青霉酸杂质26 | Puberulic acid Impurity 26 | C9H8O6
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| 3 | 33524-89-9 | 2,4-diacetyl-3-oxoglutaric anhydride | 2,4-diacetyl-3-oxoglutaric anhydride | C9H8O6
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| 4 | | dimethyl 2-formylfuran-3,4-dicarboxylate | dimethyl 2-formylfuran-3,4-dicarboxylate | C9H8O6
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| 5 | | dimethyl 4-oxo-4H-pyran-2,6-dicarboxylate | dimethyl 4-oxo-4H-pyran-2,6-dicarboxylate | C9H8O6
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| 6 | 54440-92-5 | 沙丁胺醇杂质12 | 5-(DIHYDROXYACETYL)-2-HYDROXY-BENZOIC ACID | C9H8O6
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| 7 | 949-33-7 | 2(5H)-Furanone,4,4'-methylenebis[3-hydroxy- | 2(5H)-Furanone,4,4'-methylenebis[3-hydroxy- | C9H8O6
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| 8 | | 3,4,7,8-TETRAHYDROXY-6H-BENZO[B,D]PYRAN-6-ONE | 3,4,7,8-TETRAHYDROXY-6H-BENZO[B,D]PYRAN-6-ONE | C9H8O6
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| 9 | 717-72-6 | 白屈菜酸单乙酯 | 6-(ethoxycarbonyl)-4-oxo-4H-pyran-2-carboxylic acid | C9H8O6
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| 10 | 412035-75-7 | Benzoic acid, 3-formyl-2,4-dihydroxy-6-methoxy- (9CI) | Benzoic acid, 3-formyl-2,4-dihydroxy-6-methoxy- (9CI) | C9H8O6
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| 11 | 6558-96-9 | 4H-Pyran-2,6-dicarboxylic acid, 4-oxo-, dimethyl ester | 4H-Pyran-2,6-dicarboxylic acid, 4-oxo-, dimethyl ester | C9H8O6
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| 12 | 727422-53-9 | 2-Propenoic acid, 3-(2,3,4,6-tetrahydroxyphenyl)- (9CI) | 2-Propenoic acid, 3-(2,3,4,6-tetrahydroxyphenyl)- (9CI) | C9H8O6
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| 13 | 693250-21-4 | 2H-1-Benzopyran-2-one, 3,4-dihydro-3,4,7,8-tetrahydroxy- (9CI) | 2H-1-Benzopyran-2-one, 3,4-dihydro-3,4,7,8-tetrahydroxy- (9CI) | C9H8O6
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| 14 | 364364-87-4 | 1,4-Benzenedicarboxylic acid, 2,3-dihydroxy-, monomethyl ester (9CI) | 1,4-Benzenedicarboxylic acid, 2,3-dihydroxy-, monomethyl ester (9CI) | C9H8O6
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| 15 | 90887-53-9 | 软毛青霉酸杂质27 | 1,3,6-Cycloheptatriene-1-carboxylic acid, 3,4,6-trihydroxy-5-oxo-, methyl ester | C9H8O6
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| 16 | 351069-92-6 | Butanoic acid, 4-(4-hydroxy-5-oxo-2(5H)-furanylidene)-3-oxo-, methyl ester, (4E)- (9CI) | Butanoic acid, 4-(4-hydroxy-5-oxo-2(5H)-furanylidene)-3-oxo-, methyl ester, (4E)- (9CI) | C9H8O6
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| 17 | 351069-94-8 | 2-Butenoic acid, 3-hydroxy-4-(4-hydroxy-5-oxo-2(5H)-furanylidene)-, methyl ester, (2Z,4E)- (9CI) | 2-Butenoic acid, 3-hydroxy-4-(4-hydroxy-5-oxo-2(5H)-furanylidene)-, methyl ester, (2Z,4E)- (9CI) | C9H8O6
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| 18 | 127311-90-4 | 4,7-Epoxyisobenzofuran-5-carboxylic acid, octahydro-1,3-dioxo-, (3a-al pha,4-beta,5-alpha,7-beta,7a-alpha)- | 4,7-Epoxyisobenzofuran-5-carboxylic acid, octahydro-1,3-dioxo-, (3a-al pha,4-beta,5-alpha,7-beta,7a-alpha)- | C9H8O6
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