Novel compounds for use in cognition improvement
A technology of compounds and groups, applied in the direction of active ingredients of heterocyclic compounds, organic chemistry, drug combination, etc.
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[0238] The general procedure of the preparative HPLC purification method:
[0239] HPLC measurements were performed using a Gilson 281 from a 233 pump (binary), autosampler and UV detector. Fractions were detected by LC-MS. The MS detector was configured with an electrospray ionization source. The source temperature was maintained at 300°C to 350°C.
[0240] HPLC method (purification method):
[0241] method 1 : reverse phase HPLC on luna (100 x 30 mm; 5 μm). Solvent A: water with 0.075% TFA; solvent B: acetonitrile. Gradient: 28% B to 58% B in 10.5 minutes at 25°C; then hold 58% B for 4 minutes, PDA.
[0242] Method 2 : reverse phase HPLC on luna C8 (100 x 30 mm; 5 μm). Solvent A: NH 4 HCO 3 10 mM aqueous solution; solvent B: acetonitrile. Gradient: at 25°C, from 45% B to 65% B in 12 minutes, hold 65% B for 2 minutes; then from 65% B to 95% B in 0.2 minutes, hold 95% for 2 minutes B; then reach 45% B in 0.2 minutes, hold 45% B for 1.4 minutes. Flow rate: 20mL / ...
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