title: 6'-Bromo-1'H-spiro-[cyclo-hexane-1,2'-pyrido[2,3-d]pyrimidin]-4'(3'H)-one.
abstract: The title compound, C(12)H(14)BrN(3)O, is built up from two fused six-membered rings and one six-membered ring linked through a spiro C atom. The hydro-pyrimidine ring has an envelope conformation and the cyclo-hexane ring is in a chair conformation. In the crystal, mol-ecules are linked by N-H⋯O and N-H⋯N hydrogen bonds, forming a mol-ecular tape along the b axis.
authors.affiliation: School of Chemical Engineering and Environment, Beijing Institue of Technology, Beijing 100081,  People's Republic of China.
authors.forename: Liupan
authors.initials: L
authors.lastname: Yang
authors.forename: Daxin
authors.initials: D
authors.lastname: Shi
authors.forename: Shu
authors.initials: S
authors.lastname: Chen
authors.forename: Hongxin
authors.initials: H
authors.lastname: Chai
authors.forename: Jiarong
authors.initials: J
authors.lastname: Li