Hydrophobic deep eutectic solvents were investigated for tetracycline microextraction. It was found that a deep eutectic solvent consisting of thymol and octanoic acid provided a synergistic effect on tetracycline extraction. In this paper, a novel liquid–liquid microextraction procedure for the HPLC-DAD determination of tetracyclines in milk samples was proposed. [ABSTRACT FROM AUTHOR]
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as kadsuraol A from Kadsura longipedunculata. [ABSTRACT FROM AUTHOR]
A personal selection of 32 recent papers is presented covering various aspects of current developments in bioorganic chemistry and novel natural products such as macrophilone A from Macrorhynchia philippina. [ABSTRACT FROM AUTHOR]
Covering: 1966 up to the end of 2013 The paper reviews the known examples of cyclic terpenoids produced from open chain polyenic precursors by an “unusual” biosynthetic pathway, involving selective electrophilic attack on an internal double bond followed by cyclization. The resulting compounds possess cyclic backbones with pendant terminal prenyl groups. Synthetic approaches applied for the synthesis of such specifically functionalized compounds are also discussed, as well as biological activity of reported representatives. [ABSTRACT FROM AUTHOR]