1,4-Bis(2-chloroethyl)-1,4-diazabicyclo(2.2.1)heptane diperchlorate 1,4-Bis(2-chloroethyl)-1,4-diazoniabicyclo(2.2.1)heptane diperchlorate 1,4-Diazoniabicyclo(2.2.1)heptane, 1,4-bis(2-chloroethyl)-, diperchlorate 1020-94-6 15567-82-5 AI3-51214 NSC 57198