title: 1,1',3,3',5,5'-Hexamethyl-spiro-[furo[2,3-d]pyrimidine-6(5H),5'-pyrimidine]-2,2',4,4',6'(1H,3H,1'H,3'H,5'H)-penta-one.
abstract: In the title mol-ecule, C(15)H(18)N(4)O(6), the fused 2,3-dihydro-furan ring has an envelope conformation and the spiro pyrimidine ring has a half-chair conformation. In the crystal, short inter-molecular O⋯C contacts of 2.835 (4) and 2.868 (4) Å between the carbonyl groups indicate the existence of electrostatic inter-actions, which link the mol-ecules into corrugated sheets parallel to the ab plane.
authors.affiliation: Department of Chemistry, Faculty of Science, Urmia University, 57159 Urmia, Iran.
authors.forename: Nader
authors.initials: N
authors.lastname: Noroozi Pesyan
authors.forename: Saeed
authors.initials: S
authors.lastname: Rastgar
authors.forename: Yaser
authors.initials: Y
authors.lastname: Hosseini