| http://www.w3.org/ns/prov#value | - H2 N--R--NH2 wherein R is aliphatic hydrocarbon, optionally substituted or interrupted by hetero atoms and in particular by oxygen atoms, having from 2 to 36 carbon atoms and more particularly from 6 to 20 carbon atoms, such as 1,2-diaminoethane, 1,6-diaminohexane, 1,9-diaminononane, 1,12-diaminododecane, dimeric fatty acid amine (prepared by known processes from dimeric fatty acids), the 2,2,4(4,
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