You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-amino-9-[(1S,6R,8R,10S,15R,17R)-17-(6-aminopurin-9-yl)-12-hydroxy-3-oxo-3-sulfanyl-12-sulfanylidene-2,4,7,11,13,16-hexaoxa-3lambda5,12lambda5-diphosphatricyclo[13.3.0.06,10]octadecan-8-yl]-1H-purin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H24N10O9P2S2
assistant