Objective: To investigate the chemical constituents in the seeds of Chimonanthus praecox var. concolor. Methods: The column chromatography and recrystallization methods were used for the isolation and the purification of compounds, and the spectroscopic methods (MS, NMR, etc.) were used for the structural identification. Results: A new alkaloid chimonanthconin (1) and a new natural compound N 1 ,N 10 -dimethyltryptamine (2), along with six known compounds, 10-heneicosenoic acid (3), β-sitosterol (4), β-daucosterol (5), daucoster linoleate (6), scopoletin (7), and p-hydorxyleinnamaldehyde (8), were isolated and identified. Conclusion: Compound 1 is a new alkaloid and named chimonanthconin and compound 2 is a new natural compound. And other compounds are isolated from this plant for the first time.