You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [(2R,4S,5E,7R,8Z)-7-[(E)-3-(4-methoxyphenyl)prop-2-enoyl]oxy-2-methyl-10-oxo-2,3,4,7-tetrahydrooxecin-4-yl] (E)-3-(4-methoxyphenyl)prop-2-enoate into molecular formula.
user
C30H30O8
assistant