You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R)-1-[[4-[4-(2-benzyl-1-benzofuran-3-yl)phenyl]phenyl]methyl]-2-methyl-4-phenylmethoxypyrrolidin-1-ium-1-carboxylic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C41H38NO4+
assistant