You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-amino-9-[(3R,5S)-3-[[(2R,3S,4R,5R)-5-(6-aminopurin-9-yl)-3-hydroxy-4-methoxy-2-methyloxolan-2-yl]methoxy-hydroxyphosphinothioyl]oxy-5-(hydroxymethyl)oxolan-2-yl]-1H-purin-6-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C22H29N10O9PS
assistant