Ecdysteroids from the Roots of Serratula chinensis
Seven ecdysteroids, 20-hydroxyecdysone (1), podecdysone C (2), 3-O-acetyl-20-hydroxyecdysone (3),20-hydroxyecdysone-20, 22-butylidene acetal (4), shidasterone (5), atrotosterone C (6) and carthamosterone (7),were isolated from the roots ofSerratula chinensis S. Moore. All compounds except compound 1 were isolatedfrom this plant for the first time, and compound 4 was found to be a new ecdysteroid.