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 4-[(2S)-3-(3,5-dihydroxyphenyl)-4-hydroxy-6-[(E)-2-(4-hydroxyphenyl)ethenyl]-2,3-dihydro-1-benzofuran-2-yl]benzene-1,3-diol .
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