You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl 2-[[[(2R)-3-(3-chloro-4-methoxyphenyl)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propyl]amino]methyl]-3-hydroxy-2-methylpropanoate .
user
C21H33ClN2O6
assistant