You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,2R,3R,4S,5R,7S,9R,11R,12R,15S)-8-(phenylmethoxymethoxy)heptacyclo[9.6.0.02,9.03,7.04,17.05,15.012,16]heptadec-13-ene-6,10-dione into molecular formula.
user
C25H24O4
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