You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(3R,6S,9R,17R,20S)-N-[(4R)-6-amino-4-[(2-amino-2-oxoethyl)carbamoyl]-2-oxohexyl]-20-(2-amino-2-oxoethyl)-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 The above is the IUPAC name of a molecule. Write its molecular formula.
user
C44H65N9O13
assistant