| prov:value
| - R13 is ##STR6## ???BR17, --AlR17, --Ge--, --Sn--, --O--, --S--, ???SO, ???SO2, ???NR17, ???CO, ???PR17 or ???P(O)R17, in which R17, R16 and R19 are identical or different and are a hydrogen atom, a halogen atom, a C1 -C30 -, preferably C1 -C4 -alkyl group, in particular a methyl group, a C1 -C10 -fluoroalkyl group, preferably a CF3 group, a C6 -C10 -fluoroaryl group, preferably a penta-fluoropheny
|