You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-ethyl-4-[[[N'-methyl-N-(2-methyl-2-morpholin-4-ylpropyl)carbamimidoyl]amino]methyl]benzamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H33N5O2
assistant