| http://www.w3.org/ns/prov#value | - Derivatives of compound (6) in which the phenyl group is substituted, e.g. with alkoxy or alkyl, are readily obtained by selection of an appropriate substituted phenyl acetaldehyde starting compound (1) 4 acetyl-2-phenylthiophene, and related compounds in which the phenyl group is substituted are novel compounds.
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