Synonyms: NSC281682;58979-91-2;AC1L87M3;NSC 281682;NSC-281682;3-N,8-N-diphenyl-2,3,7,8-tetrazaspiro[4.4]nonane-3,8-dicarboxamide;N(2),N(7)-Diphenyl-2,3,7,8-tetraazaspiro(4.4)nonane-2,7-dicarboxamide;N~2~,N~7~-Diphenyl-2,3,7,8-tetraazaspiro[4.4]nonane-2,7-dicarboxamide