Isolation and Identification of Belamcandaoids A-N from Belamcanda Chinensis Seeds and Their Inhibition on Extracellular Matrix in TGF-β1 Induced Kidney Proximal Tubular Cells.

Belamcandaoids A-N (1-14), fourteen new triterpenoids were isolated from the seeds of Belamcanda chinensis. Their structures including absolute configurations were assigned by using spectroscopic, computational, and crystallographic methods. All the compounds except 1 and 2 are 3,4-seco-triterpenoids belonging to fernane type. Biological evaluation results indicated that 3 and 13 could reduce fibronectin and collagen I expression respectively in TGF-β1 induced kidney proximal tubular cells.