HCID 86607508, compound → HCID 66861293, compound

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The title compound was prepared from a mixture of 4-bromo-7-hydroxy-2-phenylsulfanyl-thieno[3,2-c]pyridine-6-carboxylic acid n-butyl ester and 7-bromo-4-hydroxy-2-phenylsulfanyl-thieno[2,3-c]pyridine-5-carboxylic acid n-butyl ester, example 17.b, under conditions analogous to experimental example 1.g. The products were purified by column chromatography eluting from silica gel with a gradient of 20-60% ethyl acetate in hexanes. Product A, (Lower Rf product); MS: (+) m/z 360.01 (M+1); Product B, (Higher Rf product); MS: (+) m/z 360.02 (M+1).

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