Objective: To study the chemical constituents of the roots and rhizomes of Asarum longerhizomatosum.
Method: Chromatography and spectral analysis were used to isolate the constituents and elucidate their structures.
Result: Five compounds were isolated from the ethanol extracts of the roots and rhizomes, and identified as asarone(I), beta-sitosterol(II), 2,4,5-trimethoxybenzaldehyde(III), 4-(2,4,5-trimethoxyphenyl)-3-en-butylone(IV) and 3 beta-hydroxystigmast-5-en-7-one(V).
Conclusion: All the compounds were isolated from the plant for the first time, and IV is a new natural product.