[1] Univ Babes Bolyai, Dept Biochem & Biochem Engn, RO-400028 Cluj Napoca, Romania
[2] Budapest Univ Technol & Econ, Dept Organ Chem & Technol, H-1111 Budapest, Hungary
[3] Budapest Univ Technol & Econ, Res Grp Alkaloid Chem HAS, H-1111 Budapest, Hungary