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. Author manuscript; available in PMC: 2010 Jul 12.
Published in final edited form as: J Pharm Biomed Anal. 2009 Feb 20;49(5):1141–1149. doi: 10.1016/j.jpba.2009.02.011

Figure 5. Relative concentration of dodecatetraenoic acid isobutylamides (alkylamides K, L and M) in an E. purpurea root extraction over time.

Figure 5

Relative concentrations (CR) were calculated by dividing the concentration of each sample (CS) by the concentration at day 2 (Cday2) and converting to percent: CR = CS/Cday2 × 100. Samples were taken daily over 28 days from dry root (1:11) ethanolic maceration of E. purpurea. Results show that maximal extraction of dodecatetraenoic acid isobutylamide is achieved by day 2.