... Chemistry.-Preparation of almost all 2-ar~l-1~3- indandiones required for this study was ... above for 40 weye siiperior to yields obtained by the method iised for 46 (Table 11). ... rexidiie was- added 8.2 g (0.040 mole) of ni-trifliioromethylpheiiyl- acetic acid (Pierce Chemical Co.) and ...