| http://www.w3.org/ns/prov#value | - wherein R1 is selected from hydrogen, halogen, cyano, and C1-C6 alkyl; wherein R2 is selected from hydrogen, halogen, cyano, and C1-C6 alkyl; wherein one of R3 and R4 is selected from halogen or nitro, and the other is hydrogen; wherein R14 is a protecting group; and (b) reacting the first compound with a second compound having a structure represented by the formula:
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