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 (1R,2R,3R,4R,5R,6S)-3-[6-(cyclopropylamino)purin-9-yl]-6-(hydroxymethyl)bicyclo[2.2.1]heptane-2,5-diol ?
user
C16H21N5O3
assistant