RomanaRošicaJanPelipenkoaJulijanaKristlaPetraKocbekaMarijaBešter-RogačbSašaBaumgartnera University of Ljubljana, Faculty of Pharmacy, Aškerčeva cesta 7, 1000 Ljubljana, Slovenia bUniversity of Ljubljana, Faculty of Chemistry and Chemical Technology, Aškerčeva cesta 5, 1000 Ljubljana, Slovenia Received 18 July 2012, Revised 20 November 2012, Accepted 26 November 2012, Available online 5 December 2012.