13908-61-7 3,3'-trans-Vinylenebis(1-(2-chloroethyl)urea) NSC 82188 Urea, 1,1'-vinylenebis(3-(2-chloroethyl)-, (E) trans-1,1'-Vinylenebis(3-(2-chloroethyl)urea) trans-3,3'-Bis(2-chloroethyl)-1,1'-vinylenediurea