You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name (5R)-3-[[4-amino-6-(2-methylanilino)-1,3,5-triazin-2-yl]methyl]-5-hexyl-5-methylimidazolidine-2,4-dione ?
user
C21H29N7O2
assistant