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What is the molecular formula of the molecule S-[2-[[(2S,5aR,7R,8R,8aR)-7-(4-amino-2-oxopyrimidin-1-yl)-8-hydroxy-8-methyl-2-oxo-5,5a,7,8a-tetrahydro-4H-furo[3,2-d][1,3,2]dioxaphosphepin-2-yl]oxy]ethyl] 3-(ethoxycarbonylamino)-2,2-dimethylpropanethioate ?
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C21H33N4O10PS
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