prov:value
| - is ???NHR1 (where R1 is a substituent with a hydroxyl, a substituted hydroxyl, an ester, or a carbonyl), ???Cl, ???Br, or ???H) (where Y is ???H, ???NH2, or ???NHR1 (where R1 is a substituent with a hydroxyl, a substituted hydroxyl, an ester, or a carbonyl), and Z is ???Cl or ???NHR1 (where R1 is a substituent with a hydroxyl, a substituted hydroxyl, an ester, or a carbonyl)) (where R1 is ???Cl o
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