You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[9-[2-[(4-formylphenyl)sulfonylmethylamino]ethyl]-9-methyl-3-oxa-9-azoniatricyclo[3.3.1.02,4]nonan-7-yl] 2-[tert-butyl(dimethyl)silyl]oxy-2,2-dithiophen-2-ylacetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H45N2O7S3Si+
assistant