You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2E)-7-[[bis(2-methylpropyl)amino]methyl]-2-[(3,4-dichlorophenyl)methylidene]-6-hydroxy-4-methyl-1-benzofuran-3-one by IUPAC nomenclature, provide its molecular formula.
user
C25H29Cl2NO3
assistant