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 fluoroaryl group, preferably a C6???C20 fluoroaryl group, a C1???C20 alkoxy group, preferably a C1???C10 alkoxy group
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