You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-methyl-N-[[2-(morpholin-4-ylmethyl)phenyl]methyl]-2-thiophen-3-yl-1,3-thiazole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H23N3O2S2
assistant