You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named [(1S,4S,5R,6S,7S,17R,18E)-1,4-dihydroxy-5,17,19-trimethyl-14-oxo-16-[(1R)-1-[2-oxo-2-[(2-phenylphenyl)methylamino]acetyl]oxyethyl]-15-oxatetracyclo[9.8.0.02,8.03,7]nonadeca-9,18-dien-6-yl] 1H-pyrrole-2-carboxylate is given. What is its corresponding molecular formula?
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C43H48N2O9
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