You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4Z,7E)-4-(3,4-dichlorophenyl)-7-[formyl(methyl)amino]-N-methyl-N,3-dipropyl-2,6-dihydro-1H-1,3,6-triazocine-8-carboxamide into its molecular formula.
user
C21H29Cl2N5O2
assistant