You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2,2-dichloro-N-[3-[3-(2,6-dichlorophenyl)-1,2-oxazol-5-yl]phenyl]-2-diethoxyphosphorylacetamide into molecular formula.
user
C21H19Cl4N2O5P
assistant