You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[[[4-[2-(2-phenylphenyl)ethoxy]phenyl]carbamoylamino]methyl]pyridin-1-ium-1-yl]methyl formate is the IUPAC name of a molecule. Please give its molecular formula.
user
C29H28N3O4+
assistant