Flecainide acetate54143-56-5100 % similar Flecainide54143-55-485 % similar 2,5-Bis(2,2,2-trifluoroethoxy)benzoic acid35480-52-547 % similar 1,1-Dimethylethyl N-[(2S)-2-piperidinylmethyl]carbamate139004-93-635 % similar 1,1-Dimethylethyl N-[(2R)-2-piperidinylmethyl]carbamate139004-96-935 % similar