Research Article

Preparation and Safety Evaluation of Centella asiatica Total Glycosides Nitric Oxide Gel and Its Therapeutic Effect on Diabetic Cutaneous Ulcers

Figure 3

The HPLC chromatogram. (a) Reference solution. (b) Test solution. (c) Negative reference solution: (1) madecassoside; (2) asiaticoside.
(a)
(b)
(c)