LC chromatography determinations were performed in an
Agilent 1100 Series (Santa Clara, CA, USA) equipped with a
G1322A degasser, a G1311A quaternary pump and a G1315 diode
array detector (DAD). A Kromasil 100C18 column (250 × 2.0 mm,
5 m), employed for LC separations, was obtained from Scharlau