You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[2-methyl-2-[4-[4-[4-(1-propoxyethoxy)phenyl]buta-1,3-dienyl]phenoxy]propyl]phenyl]ethenol is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H38O4
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