prov:value
| - R13 is ##STR5## ???BR14, ???AIR14, --Ge--, --O--, --S--, ???SO, ???SO2, ???NR14, ???CO, ???PR14 or ???P(O)R14, where R14 and R15 are identical or different and are a hydrogen atom, a halogen atom, a C1 -C10 -, preferably a C1 -C4 -alkyl group, in particular a methyl group, a C1 -C10 -fluoroalkyl group, preferably a CF3 group, a C6 -C10 -, preferably C6 -C8 -aryl group, a C6 -C10 -fluoroaryl group,
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