You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-[1-[N-ethyl-N'-(3-phenoxypropyl)carbamimidoyl]piperidin-3-yl]acetamide;hydroiodide by IUPAC nomenclature, provide its molecular formula.
user
C19H31IN4O2
assistant