You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R,3R)-2-[(E)-3-[3,4-dihydroxy-7-(5,6,12-trihydroxy-3-tricyclo[9.4.0.02,7]pentadeca-1(11),2(7),3,5,12,14-hexaenyl)spiro[6H-naphthalene-5,1'-cyclopentane]-1-yl]prop-2-enoyl]oxy-4-(ethylamino)-3-(3,4,5-trihydroxyphenyl)butanoic acid into molecular formula.
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C44H45NO12
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