The resulting 2-phenylethyl-3-hydroxypyridines, containing methoxy groups in the phenyl ring, were demethylated by boiling with 48% HBr, to form compounds XII-XIV, and iodination of 2-phenylethyl-3-hydroxypyridines in a 10% aqueous solution of soda with iodine in the presence of KI was used to form the 6-iodo derivative of 3-hydroxypyridine (XV), with subsequent replacement of the iodine atom with a methoxy group (XVI).