| http://www.w3.org/ns/prov#value | - kyl group, which may be halogenated, a C6 -C10 -aryl group, an --NR16 2, --SR16, --OSiR16 3, --SiR16 3 or --PR16 2 radical, in which R16 is a halogen atom, a C1 -C10 -alkyl group or a C6 -C10 -aryl group, R4 to R12 are identical or different and are as defined for R3, or adjacent radicals R4 to R12, together with the atoms connecting them, form one or more aromatic or aliphatic rings, or the radic
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