Figure 2From: Changes in the contents of four active diterpenoids at different growth stages in Andrographis paniculata (Burm.f.) Nees (Chuanxinlian)HPLC chromatograms of four diterpenoids in Andrographis paniculata. A. Four standard diterpenoids; B. Leaf sample of Andrographis paniculata at transfer stage; and C. Leaf sample of Andrographis paniculata at mature-seed stage.Back to article page