2H-Indol-2-one,1,3-dihydro-4-(2-hydroxyethyl)- , with CAS number of 139122-19-3, can be called 2H-indol-2-one, 1,3-dihydro-4-(2-hydroxyethyl)- ; 4-(2-Hydroxyethyl)-1,3-dihydro-2H-indol-2-one ; 4-(2-Hydroxyethyl)oxyindole .