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HPLC/MS identification of the terpenoid components of Chaga extract: (A) chromatogram with the identified peaks; (B) chromatogram recorded in positive mode in which a peak at 6.5 min, with m/z of 425, can be identified as inotodiol; (C) MS fragmentation pathway of betulin in positive ion mode showing the species at m/z 425 and fragment ions at m/z 407 and 191; (D) MS fragmentation pathway of inotodiol in positive ion mode 425 m/z and fragment ions at m/z 407 and 247.
