You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[[(1R)-2-[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]cyclopentanecarbonyl]amino]cyclopropane-1-carboxylic acid into molecular formula.
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C18H28N2O6
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