The asymmetric unit of the title compound. C11H12N2O·C25H28N4O2. contains two different molecules. The smaller is known as antipyrine [systematic name: 1. https://www.hindigyanvishv.com/hot-find-Facia-Installation-Kit-Suits-Holden-Commodore-VE-Series-2-FP9550BK-Black-top-mega/