You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(E)-3-[(2R,3S)-2-[(2S,3R)-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-7-methoxy-2,3-dihydro-1-benzofuran-5-yl]-3-(hydroxymethyl)-7-methoxy-2,3-dihydro-1-benzofuran-5-yl]prop-2-enal is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H30O9
assistant