. Reference masses of m/z 112.9855 and 1033.9881 were used
to calibrate the mass axis during analysis. Fragmentor voltage and
skimmer potential was set at 170 V and 120 V, respectively. Ion
source parameters: flow and temperature of the drying gas (N2):
7 l/min and 300 ◦C, pressure of the nebulizer gas (N2): 45 psi, capillary
voltage: 3500 V, sheath gas flow and temperature: 11 l/min
and 300 ◦C, respectively. Mass spectra were processed by Agilent
MassHunter B.03.01 software