prov:value
| - Examples of other substituents are sulphonate, carboxylate, ureido C1-4 -alkyl, C1-4 -alkoxy, mono- and di-alkylamino, unsubstituted and mono- and di-alkylamino-sulphonyl and carbonyl, phenylamino, C1-4 -alkyl-carbonylamino, hydroxy, nitro and halogen, especially chlorine.
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