You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3aR,4R,6R,6aR)-4-(6-aminopurin-9-yl)-2,2-dimethyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxole-6-carbonitrile by IUPAC nomenclature, provide its molecular formula.
user
C13H14N6O3
assistant