batch number: X03511Y123220) was purchased from source leaf organisms
(Shanghai, China). UHPLC grade methanol was provided by Merck (Canada).
Formic acid and acetonitrile were supplied by Thermo Fisher Scientific
(Fair Lawn, NJ, USA). Water was obtained from Watsons (Guangdong,
China).
Vanquish UHPLC (Thermo Scientific, Germany) equipped
with a vanquish autosampler, a vanquish pump, and a vanquish column
compartment; a Q-Exactive Plus Orbitrap MS (Thermo Scientific, Germany),
and an X-30R all-purpose high-speed freeze centrifuge (Berle X-mark,
USA) were used.