You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(furan-2-yl)-5-N-methyl-5-N-[[(2R)-1-[(5-methyl-1,2-oxazol-3-yl)methyl]piperidin-2-yl]methyl]-[1,2,4]triazolo[1,5-a][1,3,5]triazine-5,7-diamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H25N9O2
assistant