You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 6-methyl-4-oxo-3-[(3E)-2-oxo-3-(1,3,3-trimethylindol-2-ylidene)propyl]furo[2,3-d]pyrimidine-5-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C24H25N3O5
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