4‐Amino‐5‐(2‐hydroxy‐4,4‐di­methyl‐6‐oxo­cyclo­hexenyl­methyl)‐1‐methyl‐2‐(methyl­sulfanyl)­pyrimidin‐6(1H)‐one: hydrogen‐bonded chains are π‐stacked in pairs

Molecules of the title compound, C₁₅H₂₁N₃O₃S, have a markedly polarized electronic structure; the carbocyclic ring adopts an envelope conformation and the overall molecular conformation appears to be controlled by two intramolecular hydrogen bonds, one each of the O—H?O and N—H?O types. The mol­ecules are linked into C(6) chains by an intermol­ecular N—H?O hydrogen bond, and pairs of these hydrogen‐bonded chains are linked by a π–π stacking interaction.