CSUOH0901 rats blood concentrations vs time. CSUOH0901 was administrated to rats (n=3) intraperitoneally with 20mg/kg. Blood samples of 150 μL each were collected from the saphenous veins and femoral veins into heparized tubes at 0 hr (before drug administration) and at 0.25, 0.5, 1, 2, 4, 8 and 24h after dosing. The blood drug concentration was then determined with LC-MS/MS.