You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named methyl (13S,15S,17S)-13-[4-[[(4S,5R,6S,7R,8R,12R)-6-carbamoyl-8-ethyl-6,7-dihydroxy-1-azatricyclo[6.3.1.04,12]dodec-9-en-5-yl]-methylamino]-2-methoxyphenyl]-17-ethyl-17-hydroxy-1,11-diazatetracyclo[13.3.1.04,12.05,10]nonadeca-4(12),5,7,9-tetraene-13-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C43H57N5O7
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