You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-2-[[3-[[(3S,3aS)-2-[(2S)-3-methyl-2-[[(2R)-3-methyl-2-[5-(2H-tetrazol-5-yl)pentanoylamino]butanoyl]amino]butanoyl]-3,3a,4,5,6,6a-hexahydro-1H-cyclopenta[c]pyrrole-3-carbonyl]amino]-2-oxohexanoyl]amino]-3-phenylpropanoic acid into molecular formula.
user
C39H57N9O8
assistant