You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (2R,3R,4R,5S)-2-(4-aminopyrrolo[2,3-d]pyrimidin-7-yl)-5-[[(2R,4S)-4-(3-chlorophenyl)-2-oxo-1,3,2lambda5-dioxaphosphinan-2-yl]-hydroxymethyl]-3-methyloxolane-3,4-diol .
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C21H24ClN4O7P
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