You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[[1-[6-(2,2-diphenylethylamino)-9-[(2R,3R,4S,5S)-5-(3-ethyl-1,2-oxazol-5-yl)-3,4-dihydroxyoxolan-2-yl]purin-2-yl]pyrrolidin-3-yl]-(pyridine-3-carbonyl)amino] 2,2,2-trifluoroacetate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H38F3N9O7
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