You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance [(2E)-2-[(1R,2R,7S,9S)-3,3,7-trimethyl-8-tricyclo[5.4.0.02,9]undecanylidene]ethyl] acetate .
user
C18H28O2
assistant