You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (E)-3-phenylprop-2-enoic acid;(1R,7R,14R,15R)-15,16,16-trihydroxy-6,14,17-trimethyl-10-oxatetracyclo[7.7.1.02,7.013,17]heptadec-5-ene-4,11-dione .
user
C28H34O8
assistant