Curcumin[l, 7-bis(4-hydroxy-3-methoxyphenyl)-l, 6-heptadiene -3, 5-dione] is a naturally occurring compound which is the main coloring principle found in the rhizomes of the plant Curcuma longa. Curcuma longa is a traditional Chinese medicine. Curcumin will be a promising anti-cancer agent as its advantage of lower poison. We prepared seven curcumin-related compounds, 4,4' -(1, 6-heptadiene-3,5-dione-l,7-diyl)benzole acid methyl ester; 4,4' -(1, 6-heptadiene~3, 5-dione-l, 7-diyl)benzole acid; 1, 7-bis-napht...