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What is the molecular formula of the compound with this IUPAC name 7-[(1R,6R,9R,10R,15R)-8-(6-aminopurin-9-yl)-9,18-difluoro-12-hydroxy-3,3,12-trioxo-2,7,11,13,16-pentaoxa-3lambda6-thia-4-aza-12lambda5-phosphatricyclo[13.3.0.06,10]octadecan-17-yl]-3H-pyrrolo[2,3-d]pyrimidin-4-one ?
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C21H22F2N9O10PS
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