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(-)-Anonaine (1), (-)-asimilobine (2), (-)-nuciferine (3), (-)-anolobine (4), (-)-romerine (5), (-)-N-acetylanonaine (6), liriodenine (7), (+)-syringaresinol (8), N-trans-feruloyltyramine (9), N-cis-feruloyltyramine (10), scopoletin (11), 4-acetonyl-3,5-dimethoxy-p-quinol (12), vanillin (13), vanillic acid (14), syringic acid (15), beta-sitosterol (16) and stigmasterol (17) were isolated from branches of Michelia champaca L. In addition, a cell proliferation assay of five of the isolated compounds on human breast and lung cancer cells showed that liriodenine (7) was the strongest inhibitor.

Two new phenylalkanoids, 3-hydroxy-1-(4'-hydroxy-3'-methoxy-phenyl)-hexan-5-one (1) and 3-hydroxy-1-(3',5'-dimethoxy-4'-hydroxyphenyl)-hexan-5-one (2) were isolated from the rhizomes of Chinese ginger (Zingiber officinale Roscoe (Zingiberaceae)). The structures of two new phenylalkanoids were elucidated by chemical and physical evidence.

7′-(4′-hydroxyphenyl)- N-[(4-methoxyphenyl)ethyl]propenamide (1), 7′-(3′,4′-dihydroxyphenyl)- N-[(4-methoxyphenyl)ethyl]propenamide (2), N-p-trans-coumaroyltyramine (3), N-trans-caffeoyltyramine (4), β-sitostenone (5), ferulic acid (6), hydroferulic acid (7), 5-hydroxy-3,4-dimethoxycinnamic acid (8), veratic acid (9), vanillic acid (10), isovanillic acid (11), syringic acid (12), (+)-syringaresinol (13), and pheophorbide a (14) were isolated from the stems of Capsicum annuum (Solanaceae). Among them, 1 is a new amide compound. The structures of these compounds were characterized and identified by spectral analyses.

(-)-Anonaine (1), (-)-asimilobine (2), (-)-nuciferine (3), (-)-anolobine (4), (-)-romerine (5), (-)- N-acetylanonaine (6), liriodenine (7), (+)-syringaresinol (8), N-trans-feruloyltyramine (9), N-cis-feruloyltyramine (10), scopoletin (11), 4-acetonyl-3,5-dimethoxy- p-quinol (12), vanillin (13), vanillic acid (14), syringic acid (15), β-sitosterol (16) and stigmasterol (17) were isolated from branches of Michelia champaca L. In addition, a cell proliferation assay of five of the isolated compounds on human breast and lung cancer cells showed that liriodenine (7) was the strongest inhibitor.

Two new phenylalkanoids, 3-hydroxy-1-(4′-hydroxy-3′-methoxy-phenyl)-hexan-5-one (1) and 3-hydroxy-1-(3′, 5′-dimethoxy-4′-hydroxy-phenyl)-hexan-5-one (2) were isolated from the rhizomes of Chinese ginger ( Zingiber officinale Roscoe (Zingiberaceae)). The structures of two new phenylalkanoids were elucidated by chemical and physical evidence.