1 72T 7-(trifluoromethyl)-1~{H}-indole-2,3-dione 1.000 2 72S 7-methyl-1~{H}-indole-2,3-dione 0.800 3 ISN Isatin 0.733 4 Z07 4-(trifluoromethyl)-1,3-benzothiazol-2-amine 0.706