| http://www.w3.org/ns/prov#value | - R5, R5, R7, R8, R9 and R10 are identical or different and are a hydrogen atom, a halogen atom, preferably a fluorine, chlorine or bromine atom, a C1 -C10 -, preferably C2 -C4 -alkyl group, a C6 -C10 -, preferably C6 -C8 -aryl group, a C1 -C10 -, preferably C1 -C3 -alkoxy group, an --NR16 2, --SR16, --OSiR15 3, --SiR16 3 or --PR16 2 radical, in which R16 is a C1 -C10 -, preferably C1 -C3 -alkyl gro
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