You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(1R,2R,4R,6R,8S,11S)-8-hydroxy-4,9-dimethyl-14-methylidene-13-oxo-5,12-dioxatricyclo[9.3.0.04,6]tetradec-9-en-2-yl] furan-3-carboxylate into its molecular formula.
user
C20H22O7
assistant