Rosamultin has antioxidant, antiinflammatory/antinociceptive properties,and has anti-human immunodeficiency virus (HIV) activity.

Rosamultin isolated from the root of R. rugosa inhibited HIV-1 protease by 53% at a concentration of 100 microM.

A substrate, His-Lys-Ala-ArgVal-Leu-(pNO2-Phe)-Glu-Ala-Nle-Ser-NH2, Inc. For the HIV1 protease assay, the stock solution of the prepared enzyme was diluted. The extracts or compounds(Rosamultin) tested were dissolved in dimethyl sulfoxide (10% in the reaction mixture). A reaction mixture (5 uL) composed of 1 L of 50 uM sodium acetate (pH 5.0), 1 uL of a substrate solution, 1uL of the plant extract or compound solution, and 2 uL of HIV1 protease solution, was stirred, centrifuged, and then incubated at 37℃ for 1 hour in a microtube. A control reaction was performed under the same conditions without plant extract or compounds. The reaction was stopped by heating at 90 ℃ for 1 minute. Thirty-five microliters of autoclaved water was added into the reaction mixture, and an aliquot of 5 uL was analyzed by high-performance liquid chromatography (HPLC).