| http://www.w3.org/ns/prov#value | - Examples of a substituent group which may be present on Q1 and Q2 each include alkyl groups (containing preferably 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms, particularly preferably 1 to 10 carbon atoms, such as methyl, ethyl, iso-propyl, tert-butyl, n-octyl, n-decyl, n-hexadecyl, cyclopropyl and cyclopentyl groups), alkenyl groups (containing preferably 2 to 30 carbon atoms, more
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