You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(4R,6S,9E,11R,13E,15S)-17-hydroxy-4,9,13,18-tetramethyl-5,16-dioxatricyclo[13.3.0.04,6]octadeca-1(18),9,13-trien-11-yl] acetate is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H32O5
assistant