Vatsadze, S. Z., Manaenkova, M. A., Vasilev, E. V., Venskovsky, N. U., & Khrustalev, V. N. (2017). Crystal structures and supra­molecular features of 9,9-dimethyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one, 3,7-di­aza­spiro­[bi­cyclo­[3.3.1]nonane-9,1′-cyclo­penta­ne]-2,4,6,8-tetra­one and 9-methyl-9-phenyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one di­methyl­formamide monosolvate. Acta Crystallogr E Crystallogr Commun.

Vatsadze, Sergey Z., Marina A. Manaenkova, Evgeny V. Vasilev, Nikolai U. Venskovsky, και Victor N. Khrustalev. "Crystal Structures and Supra­molecular Features of 9,9-dimethyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one, 3,7-di­aza­spiro­[bi­cyclo­[3.3.1]nonane-9,1′-cyclo­penta­ne]-2,4,6,8-tetra­one and 9-methyl-9-phenyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one Di­methyl­formamide Monosolvate." Acta Crystallogr E Crystallogr Commun 2017.

Vatsadze, Sergey Z., et al. "Crystal Structures and Supra­molecular Features of 9,9-dimethyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one, 3,7-di­aza­spiro­[bi­cyclo­[3.3.1]nonane-9,1′-cyclo­penta­ne]-2,4,6,8-tetra­one and 9-methyl-9-phenyl-3,7-di­aza­bicyclo­[3.3.1]nonane-2,4,6,8-tetra­one Di­methyl­formamide Monosolvate." Acta Crystallogr E Crystallogr Commun 2017.