Yh. Chao et al., Synthesis and cytotoxicity of methyl-4,8-dihydrobenzo[1,2-b : 5,4-b ']dithiophene-4,8-dione derivatives, BIO MED CH, 7(6), 1999, pp. 1025-1031
2- and 3-Methyl-4,8-dihydrobenzo[1,2-b:5,4-b']dithiophene-4,8-dione and rel
ated derivatives were synthesized and evaluated in vitro by NCI against eig
ht cancer types. Compounds 12-15 showed significant activity against melano
ma, NCl-H23 non-small cell lung cancer, and MDA-MB-435 and MDA-N breast can
cer cell lines; 2-hydroxymethyl-4,8-dihydrobenzo[1,2-b:5,4-b']dithiophene4,
8-dione (13) showed the highest activity against melanoma (mean log GI(50)
= -7.74) and the highest overall potency (mean log GI50 = -6.99). (C) 1999
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