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Can you give the molecular formula of the molecule carboxy 12,18-dimethoxy-3,9-dimethyl-5,7,14,16-tetraoxatetracyclo[9.7.0.04,17.08,13]octadeca-1(18),2,4(17),8(13),9,11-hexaene-2-carboxylate ?
user
C20H18O10
assistant