You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-benzyl-5-methyl-3-methylsulfonyl-N-(2-thiophen-3-ylethyl)-2H-1,3-thiazol-2-amine ?
user
C18H22N2O2S3
assistant