| http://www.w3.org/ns/prov#value | - replaced by C???O, and the cyclic systems may also contain from 1 to 3 heteroatoms, such as S, N and/or O, ???(CR???R???)n???Ar or ???(CR???R???)n-Het, [0028] the radicals R5 and R6 may also jointly form with one another, in each case together with carbon atoms to which they are bonded, an unsaturated, partially saturated or fully saturated 4-, 5-, 6- or 7-membered ring, which may optionally conta
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