2-Hydroxy-2-(1,1,2,2-tetrafluoroethyl)-2,3-dihydro-4H-benzo[h]chromen-4-one;4H-Naphtho[1,2-b]pyran-4-one, 2,3-dihydro-2-hydroxy-2-(1,1,2,2-tetrafluoroethyl)-
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