Fig. 1From: Optimization of enzymatic esterification of dihydrocaffeic acid with hexanol in ionic liquid using response surface methodologyEsterification of DHCA in 1–3 days by varying molar ratio of dihydrocaffeic acid to hexanol: solution 1 (1:2), solution 2 (1:4), solution 3 (1:8) and solution 4 (1:16) keeping all other parameters constant [at temperature 55 °C and 250 rpm in ionic liquid (1-butyl-3 methylimidazolium)bis (trifluoromethylsulfonyl) imide]Back to article page