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 2,5-dichloro-N-[2-[4-(6-methoxy-1,3-benzothiazol-2-yl)piperazin-1-yl]ethyl]thiophene-3-carboxamide .
user
C19H20Cl2N4O2S2
assistant