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. 2013 Jan 15;8:2. doi: 10.1186/1749-8546-8-2

Figure 1.

Figure 1

Structures of four main active diterpenoids in Andrographis paniculata. A. andrographolide (AP1); B. 14-deoxy-11,12-didehydroandrographolide (AP3); C. neoandrographolide (AP4); and D. 14-deoxyandrographolide (AP6).