You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R,3S,4R,4aS,5S,7R,8R,8aR)-8-[(2S)-2-(furan-3-yl)-2-hydroxyethyl]-3,5-dihydroxy-4a,7,8-trimethylspiro[2,3,5,6,7,8a-hexahydro-1H-naphthalene-4,2'-oxirane]-1-yl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H32O7
assistant