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 (2,4-dimethylphenyl)methyl-[(5-ethoxycarbonyl-2-oxo-3,4-dihydro-1H-pyrimidin-6-yl)methyl]-methylazanium ?
user
C18H26N3O3+
assistant