You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[3-ethyl-5-(2-prop-2-enoyloxyethyl)-2-bicyclo[2.2.1]heptanyl]propyl prop-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H30O4
assistant