Abstract
A liquid chromatography-atmospheric pressure chemical ionization mass spectrometry procedure was applied to biotransformation experiments in cultured cells of Dicentra spectablis. Interconversions of tetrahydroberberine and berberine and those of cis- and trans-13-methyltetrahydroprotoberberines and 13-methylberberine were demonstrated. The corresponding α- N-metho salts having the B/C- cis ring-junction were produced from cis- and trans-13-methyltetrahydroprotoberberines. These findings show that the metabolism of protoberberines in D. spectablis proceeds analogously to that found in Cordyalis species.
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