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 3-indazol-1-yl-1-[(2R)-2-(5-methyl-1H-imidazol-2-yl)morpholin-4-yl]propan-1-one .
user
C18H21N5O2
assistant