You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule [1-(2,4-dichloroanilino)-1-oxopropan-2-yl] 6-oxo-7,11-diazatricyclo[7.3.1.02,7]trideca-2,4-diene-11-carbodithioate ?
user
C21H21Cl2N3O2S2
assistant