You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-[2-(2,6-dichloroanilino)-2-oxoethyl]-N-methyl-2-[(2S)-2-(1-methylpyrrol-2-yl)pyrrolidin-1-ium-1-yl]acetamide into its molecular formula.
user
C20H25Cl2N4O2+
assistant