You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-2-[4-[3-[(2-methyl-1,3-thiazol-4-yl)methoxy]benzoyl]piperazin-1-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H26N4O3S
assistant