“…Methanol or ethanol often with addition of water (Bugatti et al, 1987 ; Han et al, 1991 ; Koriem et al, 2013 ) and hydrochloric (Kursinszki et al, 2006 ; Gu et al, 2010 ) or acetic acid (Paulsen et al, 2015 ) were used as extractants. The isolation from plant material was also achieved with the use of pure acidified water; further, the solution was alkalized with ammonia or sodium hydroxide to obtain base forms followed by liquid-liquid extraction with organic solvents such as dichloromethane, butanol or chloroform (Sārközi et al, 2006 ; Sárközi et al, 2007 ; Migas et al, 2012 ; Jesionek et al, 2016 ; Bogucka-Kocka and Zalewski, 2017 ). The isolation was conducted by percolation (Capistrano et al, 2015 ), maceration (Koriem et al, 2013 ; Borghini et al, 2015 ), heating under reflux (Gu et al, 2010 ; Yao et al, 2011 ; Seidler-Łozykowska et al, 2016 ), in water bath (Sārközi et al, 2006 ) or Soxhlet apparatus (Bugatti et al, 1987 ; Stuppner and Ganzera, 1995 ) as well as ultrasound assisted (UAE) (Kursinszki et al, 2006 ; Sárközi et al, 2007 ; Paulsen et al, 2015 ; Jesionek et al, 2016 ) or microwave energy (MAE) (Then et al, 2000 ; Zhou et al, 2012 ).…”