| http://www.w3.org/ns/prov#value | - ent radicals and are each a halogen atom, a C1-C20-hydrocarbon group, ???NR16 2, ???SR6, ???OSiR16 3, ???SiR16 3 or ???PR16 2, where R16 is a radical and is a halogen atom, a C1-C10-alkyl group or a C6-C10-aryl group, R4 to R12 are identical or different radicals and are each a hydrogen atom or are each as defined for the identical or different radicals R3 or two or more adjacent radicals R4 to R1
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