STUDIES IN THE SCROPHULARIACEAE – Part V. Investigation of the Occurrence of Alkaloids inAntirrhinum orontium

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Abstract
A. orontium L. (Misopates orontium (L.) Raf.) has been found to contain seven tertiary alkaloidal bases. One has been identified as 4–ethyl–2, 6–naphthyridine, previously isolated from A. majus; a second compound has been assigned the structure C15H9N3O and some physical data is reported for a third base. Choline has also been identified and is the only quaternary base present.