You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (2R,3S)-2-[(E)-3-[7-[4,5-dihydroxy-2-(3-hydroxyphenyl)phenyl]-3,4-dihydroxyspiro[6H-naphthalene-5,1'-cyclopentane]-1-yl]oct-2-enoyl]oxy-4-(ethylamino)-3-(3,4,5-trihydroxyphenyl)butanoic acid into molecular formula.
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C46H51NO12
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