The primary medicinal component of Andrographis is andrographolide. It has a very bitter taste, is a colorless crystalline in appearance, and is called a “diterpene lactone”. The other medicinal chemicals are also bitter principles: diterpenoids viz. deoxyandrographolide, -19ß-D-glucoside, and neo-andrographolide, all of which have been isolated from the leaves. Besides the related bitters mentioned, other active components include 14-deoxy-11,12- didehydroandrographolide (andrographlide D), homoandrographolide, andrographan, andrographon, andrographosterin, and stigmasterol – the last of which was isolated from an Astrographis preparation. The leaves contain the highest amount of andrographolide (2.39%), the most medicinally active phytochemical in the plant, while the seeds contain the lowest.