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. 2018 Feb 27;17(3):832–843. doi: 10.1177/1534735418757912

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (http://www.creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — (A) Mass spectra of betulin, betulinic acid, and inotodiol. (B) Chromatograms of betulin, betulinic acid, and inotodiol in extracts of French Chaga. (C) Chromatograms of betulin, betulinic acid, and inotodiol obtained in extracts of Ukrainian (blue) and Canadian Chaga (orange).