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 [(2R,3S,5R)-3-acetyloxy-5-[4-(benzotriazol-1-yloxy)-5-methyl-2-oxopyrimidin-1-yl]oxolan-2-yl]methyl acetate .
user
C20H21N5O7
assistant