You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 5-[(1-hydroxy-7-methyl-3H-2,1-benzoxaborol-6-yl)oxy]-N-[(1R)-1-[(2S)-1-hydroxypropan-2-yl]sulfanylbutyl]pyrazine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C20H26BN3O5S
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