You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4Z)-1-(4-ethylphenyl)-4-[hydroxy-[3-(2-methylpropoxy)phenyl]methylidene]-5-(2-methoxyphenyl)pyrrolidine-2,3-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C30H31NO5
assistant