You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[(2S)-1-[2-(cyclopentyloxycarbonylamino)acetyl]pyrrolidine-2-carbonyl]amino]-3-methylpent-4-enoic acid;ethane;2-methylpropane is the IUPAC name of a molecule. Please give its molecular formula.
user
C31H63N3O6
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