Major operating parameters for the Q-TOF MS were set as follows:
capillary voltage, 2.0 kV; cone voltage, 45 V; cone gas flow,
11 L/h; collision energy, 50 eV; source temperature, 100 C; desolvation
temperature, 250 C; collision gas, argon; desolvation gas,
nitrogen; flow rate, 600 L/h; data acquisition range, m/z 100–
1000 Da; ionisation mode, positive. The data were collected by
Mass-Lynx TM V 4.1. software.