You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[[[(2S)-6-azaspiro[2.5]octan-2-yl]-(1,3-thiazol-2-ylmethyl)amino]methyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H24N4OS
assistant