You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 20-[[(1S)-4-[[(1S)-4-[[(5R)-5-[(3R)-4-amino-3-[(4-hydroxyphenyl)methyl]-4-oxobutanoyl]-9-methyl-7-oxodecyl]amino]-1-carboxy-4-oxobutyl]amino]-1-carboxy-4-oxobutyl]amino]-20-oxoicosanoic acid into molecular formula.
user
C52H84N4O13
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