Natulan, Procarbazin, Procarbazine, N-(1-methylethyl)-4-[(2-methylhydrazino)methyl]benzamide, [4-(2-methyl-hydrazino)-methyl-benzoic acid-isopropylamide], Procarbazina, N-Isopropyl-4-((2-methylhydrazinyl)methyl)benzamide, N-isopropyl-4-[(N'-methylhydrazino)methyl]benzamide, 4-[(2-methylhydrazinyl)methyl]-N-propan-2-ylbenzamide, Procarbazinum, Ibenzmethyzin