You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-cyano-3-[3-[[1-(4-ethyl-2,6-difluorophenyl)-2-methylpropan-2-yl]amino]-2-hydroxypropoxy]phenyl]benzoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H30F2N2O4
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