You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-benzyl-8-[4-(2-butoxyethoxy)phenyl]-1-[(1-methylpyrazol-4-yl)methyl]-N-[4-[(3-propylimidazol-4-yl)methylsulfinyl]phenyl]-3,4-dihydro-2H-azocin-1-ium-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C45H55N6O4S+
assistant