You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by [3,5-dimethyl-4-[2-oxo-2-[(5-oxo-4-oxatricyclo[4.2.1.03,7]nonan-3-yl)oxy]ethoxy]phenyl]-diphenylsulfanium;methane ?
user
C31H33O5S+
assistant