You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[5-[[[N-[(4,5-dimethyl-1,3-oxazol-2-yl)methyl]-N'-methylcarbamimidoyl]amino]methyl]-2-methoxyphenyl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H25N5O3
assistant