131899-25-7 2-Piperidinone, 1-(3,4-dihydro-3-hydroxy-2,2-dimethyl-6-(pentafluoroethyl)-2H-1-benzopyran-4-yl)-, (3S-trans)- 3,4-Dihydro-2,2-dimethyl-4-(oxopiperidin-1-yl)-6-pentafluoroethyl-2H-1-benzopyran-3-ol Brl 55834 Brl-55834