| http://www.w3.org/ns/prov#value | - compounds having the general formula (V) R3???CHO???(V) wherein R3 is hydrogen or linear or branched C1-C20 alkyl or alkenyl group, preferably methyl, ethyl, propyl, butyl, pentyl or hexyl; and compounds having the general formula (VI) OHC???R4???CHO???(VI) wherein R4 is a linear or branched C1-C20 saturated or unsaturated hydrocarbon or R4 is zero, when the aldehyde groups are bonded to each othe
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