You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,2-dimethyl-4-oxo-4-[[(1R,2R,5R,9R,10R,13S,14R,17S,18R,21S)-1,2,14,18-tetramethyl-5-[2-[(3R)-3-[(2-methylpropan-2-yl)oxycarbonylamino]pyrrolidin-1-yl]-2-oxoethyl]-8-propan-2-yl-20-azoniahexacyclo[11.10.0.02,10.05,9.014,21.018,21]tricos-19-yn-17-yl]oxy]butanoic acid by IUPAC nomenclature, provide its molecular formula.
user
C46H72N3O7+
assistant