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-[(3-fluorophenyl)methyl]-N-(2-methoxyethyl)-6-(1H-pyrazol-4-yl)-1,3-benzothiazole-2-carboxamide ?
user
C21H19FN4O2S
assistant