Figure 1
From: Photostability studies on (±)-tramadol in a liquid formulation
HPLC chromatogram of (±)-tramadol in aqueous solution. Peak 1; (+)-tramadol, 2; (−)-tramadol, 3; (+)-propranolol, and 4; (−)-propranolol.
Figure 1 | Journal of Pharmaceutical Health Care and Sciences