Chemical constituents of the wood and bark of Xanthoxylum cuspidatum CHAMP. (Fagara cuspidata ENGL.), a Formosan Rutaceous plant (Japanese name : Tsuru-Zansho), were examined. From the wood six alkaloids, nitridine (2) chloride, dictamine (6), γ-fagarine (7), skimmianine (8), robustine (12), and haplopine (13), β-sitosterol (9), and a new phenylpropanoid, cuspidio (11), mp 65-67°, were isolated. From the bark eight known alkaloids, 2 chloride, oxynitidine (4), des-N-methyl-chelerythrine (14), decarine (24), 7, 8, liriodenine (20), and 4-methoxy-1-methyl-2-quinolone (19), four new alkaloids, des-N-methylavicine (16), mp 290-295°, arnottianamide (18), mp 264-267°, isoarnottianamide (21), mp 254-257°, and base X-C-1 (23), mp 268-272°, 9, 11, and dihydro-p-coumaryl alcohol (22), were isolated.
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