You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (2R)-2-[[(2S)-2-amino-3-methylbutanoyl]-methylamino]-N-[(3S,6S,10S,11R,14S,15R,18S,21S)-11-[(2S)-butan-2-yl]-10-hydroxy-18-[(4-hydroxyphenyl)methyl]-15,19-dimethyl-3-(2-methylpropyl)-2,5,8,13,17,20-hexaoxo-6-propan-2-yl-7,16-dioxa-1,4,12,19-tetrazabicyclo[19.3.0]tetracosan-14-yl]-4-methylpentanamide is given. What is its corresponding molecular formula?
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C50H81N7O12
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