You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as (7R)-7-methyl-1,4-di(propan-2-yl)-7,8-dihydroimidazo[2,1-f]purin-5-one using the IUPAC nomenclature.
user
C14H21N5O
assistant