The
liquid chromatographic analysis was done on an Agilent 1200 series
HPLC (Agilent Technologies, Santa Clara, CA) equipped with a
Phenomenex Kinetex PFP column (100 mm 2.1 mm, 2.6 lm)
fitted with a Phenomenex KrudKatcher ultra column in-line filter
(Phenomenex, Torrance, CA, USA).