Table 1: HPLC parameters

Time

(min)

Reagent Aa

(%)

Reagent Bb

(%)

Flow

(mL/min)

0.0

96

4

0.6

13.0

93

7

0.6

14.0

70

30

0.6

15.0

70

30

0.6

15.1

96

4

0.6

16.0

96

4

0.7

a citrate buffer pH 4.5; b acetonitrile