You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1R,4R,5R,6S,7R,8R,11R,13R,17S,18S,19S)-4,7,8,17-tetrahydroxy-6,14,18-trimethyl-9,16-dioxo-3,10-dioxapentacyclo[9.8.0.01,7.04,19.013,18]nonadec-14-en-5-yl] acetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H28O10
assistant