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A new indolo[3,2-b]quinoline alkaloid glycoside, jusbetonin (1), and three known alkaloids, namely, 10H-quindoline (2), 6H-quinindoline (3), and 5H,6H-quinindolin-11-one (4), have been isolated from the leaves of Justicia betonica. The structure of 1 was established on the basis of 1D and 2D NMR ((1)H-(1)H COSY, HMQC, and HMBC) and HRFABMS data. Compound 1 is the first example of a glycosylated indolo[3,2-b]quinoline alkaloid, while compound 4 was isolated for the first time from a natural source.

An unusual secolignan glycoside, juspurpurin (1), and a new arylnaphthalene glycoside, justalakonin (2), together with eight known lignans were isolated from the whole plants of Justicia purpurea. Compound 1 is the first glycoside of a rare group of secolignans. The structures of the new compounds 1 and 2 were established using 1D and 2D NMR ((1)H-(1)H COSY, HMQC, and HMBC) spectral data and by chemical transformations.