prov:value
| - ???O???(CmH2mO)n???R1 in which R1 is a hydrogen atom, an aliphatic hydrocarbon radical containing from 1 to 20 carbon atoms, a cycloaliphatic hydrocarbon radical containing 5 to 8 carbon atoms or an optionally hydroxyl, carboxyl, C1-14 alkyl, or sulphonic substituted aryl radical containing 6 to 14 carbon atoms, m is 2 to 4, and n is 0 to 100, ???NH-(CmH2mO)n???R1, ???NHR2,???N(R2)2 or mixtures th
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