You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-[2-methyl-5-(2-methyl-3-methylidene-2-bicyclo[2.2.1]heptanyl)pent-2-enoxy]carbonylbenzoic acid into molecular formula.
user
C23H28O4
assistant