You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2S)-5-[2-[2-[2-[2-[2-[2-[3-[[1,3-bis(prop-2-ynoxy)-2-(prop-2-ynoxymethyl)propan-2-yl]amino]-3-oxopropoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethylamino]-2-(9H-fluoren-9-ylmethoxycarbonylamino)-5-oxopentanoic acid into molecular formula.
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C48H63N3O15
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