You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(3R)-1-[2-(cyclopropanecarbonylamino)ethyl]-1-azoniabicyclo[2.2.2]octan-3-yl] 2-hydroxy-2,2-diphenylacetate .
user
C27H33N2O4+
assistant