Occurrence of loline alkaloids in Argyreia mollis (Convolvulaceae)
1999
Tofern, B. | Kaloga, M. | Witte, L. | Hartmann, T. | Eich, E.
N-Formylloline was isolated from roots of Argyreia mollis. This is the first identification of a 1-aminopyrrolizidine alkaloid (loline alkaloid) in a species of the Convolvulaceae. Lolines are only known from the genus Adenocarpus (Fabaceae) and certain grasses (e. g. Festuca) infected with endophytic fungi. A GC-MS analysis revealed N-formylloline to be present in roots and aerial vegetative plant parts. It is accompanied by three congeners (i. e. loline, N-methylloline and N-propionylnorloline) and simple pyrrolidine alkaloids such as hygrine and its derivatives as well as tropan-3beta-ol. Lolines could not be detected in Argyreia capitata, A. hookeri, A. nervosa and numerous species of 14 other convolvulaceous genera.
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