Detection of 9-methoxy substitution in tetrahydroprotoberberine alkaloids by mass spectrometry.
D001599:Berberine / Q000031:analogs & derivatives; D001600:Berberine Alkaloids; D013058:Mass Spectrometry; D008738:Methyl Ethers
D001600:Berberine Alkaloids; D008738:Methyl Ethers; D001599:Berberine