1,19-Bis(ethylamino)-5,10,15-triazanonadecane 1,4-Butanediamine, N-(4-(ethylamino)butyl)-N'-(4-((4-(ethylamino)butyl)amino)butyl)- 147510-59-6 3,8,13,18,23-Pentaazapentacosane BE 4-4-4-4 Papc-hcl