131543-46-9 
 
592-31-4 
 
2,6-dibutyl-2,4,6,8-tetraazabicyclo3.3.0octane-3,7-dione 
 
2,8-dibutyl-2,4,6,8-tetraazabicyclo3.3.0octane-3,7-dione 
 
33599-32-5 
[1]Kravchenko;Sigachev;Maksareva;Gazieva;Trunova;Lozhkin;Pivina;Il'in;Lyssenko;Nelyubina;Davankov;Lebedev;Makhova;Tartakovsky[RussianChemicalBulletin,2005,vol.54,#3,p.691-704]