You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-(2,4-dichlorophenoxy)-N-[(Z)-(3-methoxy-2-propan-2-yloxyphenyl)methylideneamino]acetamide by IUPAC nomenclature, provide its molecular formula.
user
C19H20Cl2N2O4
assistant