You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named [3-[(5-methyl-[1,2,4]triazolo[1,5-a]pyrimidin-7-yl)oxy]azetidin-1-yl]-(4-morpholin-4-ylphenyl)methanone by IUPAC nomenclature, provide its molecular formula.
user
C20H22N6O3
assistant