You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (1R,9R)-11-(1-benzofuran-2-ylmethyl)-3-phenyl-7-aza-11-azoniatricyclo[7.3.1.02,7]trideca-2,4-dien-6-one into molecular formula.
user
C26H25N2O2+
assistant