3,7-dichloro-10-(4-methoxybenzyl)-5-propyl-5,10-dihydropyridazino[4',3':5,6]pyrazino[2,3-c]pyridazine (non-preferred name) 6,7-diazaspiro[3.5]non-7-ene, 6-acetyl-5-chloro-8-(2-chloroethyl)- InChI=1/C19H18Cl2N6O/c1-3-8-26-14-9-16(20)22-24-18(14)27(19-15(26)10-17(21)23-25-19)11-12-4-6-13(28-2)7-5-12/h4-7,9-10H,3,8,11H2,1-2H