You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name tert-butyl (4R)-5-(3-amino-4-hydroxyphenyl)-2-methyl-4-[(2-methylpropan-2-yl)oxycarbonylamino]pentanoate into its molecular formula.
user
C21H34N2O5
assistant