2-(4-Methylbenzoyl)methylene-3,4,5,6-tetrahydropyrazinone-3 3-(2-(4-Methylphenyl)-2-oxoethylidene)piperazinone 5-24-08-00219 (Beilstein Handbook Reference) 63656-21-3 BRN 0787099 Piperazinone, 3-(2-(4-methylphenyl)-2-oxoethylidene)-