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Thirteen methylpyrazoline analogs (1a-m) of combretastatin A-4 (CA-4, 2) were synthesized. The trans-geometry of the two substituted phenyl moieties was ascertained by a single crystal X-ray diffraction study of compound 1d. The cytotoxicities of the analogs against the growth of murine B16 melanoma and L1210 lymphoma cells in culture were measured using the MTT assay. One of the derivatives, 1j,...
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