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. 2023 May 15;38(1):2205042. doi: 10.1080/14756366.2023.2205042

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© 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent.

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Figure 9. — The 2,2-diphenyl-1-picrylhydrazyl (DPPH) anti-oxidant (radical scavenging) activity of compounds P1–P25 identifies modest to moderately potent antioxidant activity of one tricyclic pyrazole (a naphtho[1,2-c] pyrazole) and several pyrazolones. (A) Concentration-dependent radical scavenging activities, compared to quercetin as a positive control. (B) IC₅₀ values for appreciably active compounds. Data are expressed as mean ± SD from at least six independent experiments performed in quadruplicate.