Periplocoside M

China Journal of Chinese Medicine, 2014.

Study on Antitumor Activity and Structure-activity Relationship of C21 Steroids from Periplocae Cortex[Reference: WebLink]

To investigate the antitumor activity of five C21 steroids and illuminate the structure-activity relationship.
METHODS AND RESULTS:
MTT assay was firstly used to explore the cytotoxic activity against three cancer cell lines in vitro of compound 1- 5 isolated from Periplocae Cortex. Among the five compounds,compound 1 possessed observably antitumor activity against SMMC-7721( IC 50 12. 9 ng·L- 1),Hela( IC 50 8. 63 ng·L- 1) and MCF-7( IC 50 18. 5 ng·L- 1) cancer cell lines.
CONCLUSIONS:
Compound 1( Periplocoside M) possessed observably cytotoxic activity. The SAR of the five compounds indicated that C-3 was an important position for keeping the cytotoxic activity of C21 steroids from Periplocae Cortex.

Zhongguo Zhong Yao Za Zhi. 2012 Aug;37(15):2286-8.

A new cardiac glycoside from Periploca forrestii.[Pubmed: 23189735]

To study the chemical constituents of Periploca forrestii.
METHODS AND RESULTS:
The constituents were separate using such various column chromatographic techniques as silica gel, RP-18 silica gel, MCI and Sephadex LH-20. Their structures were identified by such methods as spectral analysis. Ten compounds were isolated and identified as periforgenin A-3-O-beta-digitoxopyranoside (1), beta-sitosterol (2), periforoside I (3), ursolic acid (4), periplogenin (5), periplocin (6), glycoside E (7), Periplocoside M (8) , daucosterol (9), 2alpha, 3alpha, 23-trihydroxy-urs-12-en-28-oic acid (10).
CONCLUSIONS:
Compound 1 was a new cardiac glycoside and compound 8 was reported for the first time from this plant.