You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R)-4-(furan-2-yl)-8-methyl-2-morpholin-4-yl-1,4-dihydropyrimido[1,2-a][1,3,5]triazin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H17N5O3
assistant