J Integr Plant Biol. ›› 2007, Vol. 49 ›› Issue (5): -.DOI: 10.1111/j.1744-7909.2007.00377.x

• Stress & Phytochemistry •    

Two New Isoprenylated Stilbenes from Artocarpus chama

Yong-Hong Wang, Ai-Jun Hou and Dao-Feng Chen   

Abstract: Two new stilbenes with two isoprenoid groups, namely artostilbenes A (compound 1) and B (compound 2), were isolated from the stems of Artocarpus chama Buch.-Ham. by repeated column chromatography. Their structures were elucidated as (E)-4-[2-(7-methoxy-2,2-dimethyl-6-(3-methylbut-2-enyl)-2H-1-benzopyran-5-yl)vinyl]benzene-1,2-diol (compound 1) and (Z)-4-[2-(7-methoxy-2,2-dimethyl-6-(3-methylbut-2-enyl)-2H-1-benzopyran-5-yl)vinyl]benzene-1,2-diol (compound 2) by spectroscopic methods, mainly by 1D-, 2D-NMR and MS spectra. Compounds 1 and 2 are two cis- and trans-isomers and compound 2 is the first cis-stilbene isolated from Moraceous plants.

Key words: Artocarpus chama, artostilbenes A and B, isoprenylated stilbene, Moraceae.

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