You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-N-[(2-amino-1,3-benzothiazol-6-yl)methyl]-6-N-cyclobutylpyridine-2,6-dicarboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H19N5O2S
assistant