You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (2R,3R,4aR,6R,8R,8aS)-8-[(E)-3-(3,4-diacetyloxyphenyl)prop-2-enoyl]oxy-6-hydroxy-2,3-dimethoxy-2,3-dimethyl-5,7,8,8a-tetrahydro-4aH-benzo[b][1,4]dioxine-6-carboxylate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H34O13
assistant