You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(2R)-2-(4,6-dimethylpyrimidin-2-yl)morpholin-4-yl]-(1H-indazol-3-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H19N5O2
assistant