You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 4-[(Z)-[3-chloro-4-[(4-chlorophenyl)methoxy]-5-ethoxyphenyl]methylideneamino]-3-ethyl-1H-1,2,4-triazole-5-thione .
user
C20H20Cl2N4O2S
assistant