You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(12S,13S,14S,15R)-14-hydroxy-18,19-dimethoxy-13,14-dimethyl-12-[(E)-2-methylbut-2-enoyl]oxy-20-oxo-3,6,8-trioxapentacyclo[9.9.1.01,16.04,21.05,9]henicosa-4(21),5(9),10,16,18-pentaen-15-yl] benzoate is the IUPAC name of a molecule. Please give its molecular formula.
user
C34H34O11
assistant