" is chosen from a hydrogen atom, a halogen atom, such as fluorine, a C1-C4 alkyl radical, a C1-C4 monohydroxyalkyl radical, a - polyhydroxyalkyl radical, a C1-C4 aminoalkyl radical, a C1-C4 cyanoalkyl radical or a (C1-C4) alkoxy(Ci-C4) alkyl radical. [00112] By way of example only, para-aminophenol, 4-amino-3-methylphenol, 4- amino-3-fluorophenol, 4- amino-3-hydroxymethylphenol, 4-amino-2-methylph" . . . .