You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3R,6S,9R,17R,20S)-20-(2-amino-2-oxoethyl)-N-[(4R)-5-[(2-amino-2-oxoethyl)amino]-4-[(4-aminophenyl)methyl]-2,5-dioxopentyl]-3-(3-amino-3-oxopropyl)-6-[(2S)-butan-2-yl]-9-[(4-hydroxyphenyl)methyl]-N-methyl-2,5,8,11,14,19-hexaoxo-1,7,13-triazacycloicosane-17-carboxamide into its molecular formula.
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C49H67N9O13
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