N-[2-(2-Oxoindolin-4-yl)ethyl]-N-propylpropan-1-amine oxide; 1,3-Dihydro-4-[2-(oxidodipropylamino)ethyl]-2H-indol-2-one; 2H-Indol-2-one,1,3-dihydro-4-[2-(oxidodipropylamino)ethyl]