You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-methyl-1-[(1-phenylcyclobutyl)methyl]-3-[(2-thiophen-2-yl-1,3-oxazol-4-yl)methyl]guanidine ?
user
C21H24N4OS
assistant