You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (3R,3aR,6S,6aR)-6a-purin-9-yl-3,3a,5,6-tetrahydro-2H-furo[3,2-b]furan-3,6-diol ?
user
C11H12N4O4
assistant