You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[methyl-[(2-methyl-1,3-thiazol-5-yl)methyl]amino]-N-[(4-phenyloxan-4-yl)methyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H27N3O2S
assistant