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. Author manuscript; available in PMC: 2021 Mar 25.
Published in final edited form as: Phytother Res. 2018 Apr 27;32(8):1636–1641. doi: 10.1002/ptr.6091

Figure 2: Ursolic acid content of Northern Labrador Tea.

Figure 2:

(A) Extracted ion chromatogram (m/z=320) corresponding to ursolic acid (UA) response in acetone extracts with 0, 10 and 100 μg UA standard added. (B) Full-scan mass spectrum of acetone extract at retention time = 57.1 min, consistent with Caligiani et al. (Caligiani et al. 2013). (C) Cellular viability was determined by MTS assay following 48-hour exposure of the C1498 AML cell line to UA or quercetin, a polyphenol prevalent in Northern Labrador Tea. UA exerted a more robust anti-AML effect than quercetin (n=6/group).