1158-80-1 3,12-Bis(2-chloroethyl)-3,12-diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane dichloride 3,12-Diaza-6,9-diazoniadispiro(5.2.5.2)hexadecane, 3,12-bis(2-chloroethyl)-, dichloride 51657-49-9 N,N(3)-Dichloroethyl-N',N(3)-dispirotripiperazine N,N3-Dichloroethyl-N1,N2-dispirotripiperazine dichloride Spirasidin Spirazidin Spirazidine