prov:value
| - R11, R12 and R13 are identical or different and are a hydrogen atom, a halogen atom, a C1 -C20 alkyl group, preferably a C1 -C10 alkyl group, a C1 -C20 fluoroalkyl group, preferably a C1 -C10 fluoroalkyl group, a C6 -C30 aryl group, preferably a C6 -C20 aryl group, a C6 -C30 fluoroalkyl group, preferably a C6 -C20 fluoroaryl group, a C1 -C20 alkoxy group, preferably a C1 -C10 alkoxy group, a C2 -C
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