prov:value
| - ogen atom, a C1 -C10 alkyl group, or a C6 -C10 aryl group; R11 and R12 are identical or different and are a hydrogen atom, a halogen atom, a C1 -C20 alkyl group, a C1 -C20 fluoroalkyl group, a C6 -C30 aryl group, a C6 -C30 fluoroaryl group, a C1 -C20 alkoxy group, a C2 -C20 alkenyl group, a C7 -C40 arylalkyl group, a C8 -C40 arylalkenyl group, a C7 -C40 alkylaryl group, or R11 and R12 together wit
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