You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl N-[3-[[(3aR,4R,6R,6aR)-4-(6-aminopurin-9-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxol-6-yl]methyl-methylamino]propyl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H33N7O5
assistant