prov:value
| - ubstituted polyalkylaryleneoxide group, R20, R21, R23, R2 3, R24, R25, R26, and R27 each, independently of the others, is (i) a hydrogen atom, (ii) a hydroxy group, (iii) an amino group of the formula ???NR28R29, wherein R28 and R29 each, independently of the others, is a hydrogen atom, an alkyl group as defined for R20, R21, R23, R23, R24, R25, R26, and R27, an aryl group as defined for R20, R21,
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