You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-(benzhydrylamino)-2-oxoethyl]-methyl-[2-oxo-2-(2,4,6-trimethylanilino)ethyl]azanium is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H32N3O2+
assistant