prov:value
| - R14 and R15 are identical or different and are a hydrogen atom, a C1-C10-, preferably C1-C3-, alkyl group, a C6-C10-, preferably C1-C3-, alkoxy group, a C6-C10-, preferably C6-C8, aryl group, a C6-C10-, preferably C6-C8-, aryloxy group, a C2-C10-, preferably C2-C4-, alkenyl group, a C7-C40-, preferably C7-C10-, arylalkyl group, a C7-C40-, preferably C7-C12-, alkylaryl group, a C8-C40-, preferably
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