You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4Z)-1-(2,5-dimethylphenyl)-4-[hydroxy-[3-methyl-4-(2-methylpropoxy)phenyl]methylidene]-5-pyridin-2-ylpyrrolidine-2,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H30N2O4
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