You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[[[N-(2-methoxy-2-methylpropyl)-N'-methylcarbamimidoyl]amino]methyl]phenyl]oxolane-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C19H30N4O3
assistant