1-Acetyl-3-indolinone , with CAS number of 16800-68-3, can be called 1-Acetyl-1,2-dihydro-3H-indol-3-one ; 3H-indol-3-one, 1-acetyl-1,2-dihydro- ; 1-Acetyl-1,2-dihydroindol-3-one ; 1-Acetyl-1,2-dihydro-indol-3-one .