
doi: 10.1007/bf00937620
In the isolation and purification of the benzophanthridine alkaloids sanguinarine and chelerythrine two minor bases — 9,10-demethylenesanguinarine and 9,10-demethylene-9,10-dehydrosanguinarine — were isolated, and it was shown that the former is an artefact produced from sanguinarine in the process of isolation and also when the sulfates of the alkaloids are subjected to prolonged storage.
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