1H- NMR spectra were recorded on a Bruker Avance 400 NMR spectrometer at 400 MHZ. The CG-MS was carried out on an Agilent Technologies (model 6890N) instrument using the following chromatographic conditions: split injection of 1 L of a 1% concentration sample; an Ultra1 column (25 m × 0.2 mm i.d), flow rate of 1.0 mL min-1 (helium as the carrier gas) and an oven temperature program of T1 = 180 °C (3 min) and T2 =280 °C (15 min), a gradient of 10 °C/min and an injector and detector temperature (FID) of 280 °C.
