You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named benzyl 4-[(7R)-8-ethoxy-7-[[5-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]-4-oxo-2,3-dihydro-1,5-benzothiazepin-3-yl]amino]-8-oxooctyl]piperidine-1-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C38H53N3O7S
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