You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule tert-butyl N-[2-[3-[3-(2,6-dichlorophenyl)-1,2-oxazol-5-yl]anilino]-2-oxoethyl]carbamate .
user
C22H21Cl2N3O4
assistant