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system
Provide the molecular formula for the IUPAC named substance 4-[4-[[4-chloro-2,3,6-trideuterio-5-(trifluoromethyl)phenyl]carbamoylamino]phenoxy]-3,5,6-trideuterio-N-methylpyridine-2-carboxamide .
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C21H16ClF3N4O3
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