Synonyms: 3,12-Bis(2-chloroethyl)-3,12-diaza-6,9-diazoniadispiro[5.2.5.2]hexadecanedichloride (7CI); 3,12-Diaza-6,9-diazoniadispiro[5.2.5.2]hexadecane,3,12-bis(2-chloroethyl)-, dichloride (8CI,9CI);N,N3-Dichloroethyl-N1,N2-dispirotripiperazine dichloride; Spirasidin;Spirazidin; Spirazidine