QC level API-4000 API-3200 API-3000 SPE LLE SPE LLE SPE LLE LQC 94.5 78.2 83.5 69.2 99.6 75.1 MQC 91.5 74.4 85.1 61.9 99.5 72.6 HQC 91.0 77.1 87.9 67.2 101.1 69.3

Table 5: Process efficiency of niacin across QC level (sample prepared by SPE and LLE and analyzed on different API model; n=6).