You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1E,6E)-1,7-bis(4-hydroxy-3-methoxyphenyl)-4-[(3R,4R,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]hepta-1,6-diene-3,5-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H30O11
assistant