Self-assembly of 2-pivaloyl-6-chloro­pterin

In the title compound, N-(6-chloro-4-oxo-3,4-di­hydro­pteridin-2-yl)­-2,2-di­methyl­propan­amide, C₁₁H₁₂ClN₅O₂, the rings in the pterin moiety are planar. The amide carbonyl O atom is in syn-periplanar conformation while the C—N—C—C propanamide linkage is antiperiplanar. The N—H⋯N and N—H⋯O intermolecular hydrogen bonds transform the mol­ecules into infinite chains.