You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(1S,2R,4S,6S,9Z,11S,12R,15R)-15-hydroxy-4,9,15-trimethyl-12-propan-2-yl-5-oxatricyclo[9.4.0.04,6]pentadec-9-en-2-yl] acetate into molecular formula.
user
C22H36O4
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