You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 3-[[(1R,2S,4R,6R,7R,8R)-8-(4-amino-2-oxopyrimidin-1-yl)-4,7-difluoro-2-hydroxy-9-oxatricyclo[4.3.0.02,4]nonan-6-yl]oxy-[di(propan-2-yl)amino]phosphanyl]oxypropanenitrile into molecular formula.
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C21H30F2N5O5P
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