[Chemical constituents of Solanum cathayanum].

To study the chemical constituents of Solanum cathayanum. Chemical constituents were isolated by chromatographic methods and identified by NMR analysis. Five compounds were isolated and identified as lignoceric acid (I), beta-sitosterol (II), lupeol (III) 8-hydroxy-3-methoxy-5H-pyrido [2, 1-c] pyrazin-5-one (IV), ethly 2,6-dioxo-1,2,3,6-tetrahy-dropyrimidine-4-carboxylate (V). Compound I and III are isolated from this plant for the first time. Compound IV and V are isolated from the genus of Solanum for the first time.