You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-2-[(4-ethylphenyl)carbamoylamino]-N-[(1S,8S,11S,17S,20S,21S,25R)-25-hydroxy-11,20-dimethyl-2,9,12,18,22-pentaoxo-19-oxa-3,10,13,23-tetrazatetracyclo[21.4.0.03,8.013,17]heptacosan-21-yl]-3-(3-methylphenyl)propanamide into molecular formula.
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C43H57N7O9
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