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system
Can you give the molecular formula of the molecule 2',7'-bis(2-carboxyethyl)-3',6'-dihydroxy-1-oxospiro[2-benzofuran-3,9'-xanthene]-5-carboxylic acid;2',7'-bis(2-carboxyethyl)-3',6'-dihydroxy-3-oxospiro[2-benzofuran-1,9'-xanthene]-5-carboxylic acid ?
user
C54H40O22
assistant