You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-methoxy-N-[(1R)-1-[7-[(3-methoxyphenyl)methyl]-5,6,8,9-tetrahydro-[1,2,4]triazolo[4,3-d][1,4]diazepin-3-yl]-2-methylpropyl]acetamide .
user
C21H31N5O3
assistant