You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 2-amino-9-[(1S,6R,8R,9R,10S,13Z,15R,17R,18R)-3,9,12,18-tetrahydroxy-8-(6-methylsulfanylpurin-9-yl)-3,12-dioxo-2,4,7,11,16-pentaoxa-3lambda5,12lambda5-diphosphatricyclo[13.3.0.06,10]octadec-13-en-17-yl]-1H-purin-6-one into molecular formula.
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C22H25N9O12P2S
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