From the bark extracts of Ziziphus hysodrica, Z. mauritiana, Scutia buxifolia and Araliorhamnus vaginata, in addition to known peptide alkaloids, four new compounds of this class, Hysodricanine-A, Mauritine-H, Scutianine-F, and Aralionine-C, have been isolated and their structures elucidated. All alkaloids contain a 14-membered ring system: two belong to the Amphibine-B-type, one to the Frangulanine-type, and one to the Integerrine-type [2].