Aim: To study the chemical constituents of Marsdenia tenacissima (Roxb.) Wight et Arn.
Methods: To separate compounds with various chromatography technology and to elucidate their structures by chemical and spectral analysis.
Results: Two compounds were isolated from Marsdenia tenacissima and their stuctures were determined as tenacissosides J (I) and tenacissosides K (II).
Conclusion: Compounds I and II are new C21 steroidal glycosides.