prov:value
| - radicals R5 to R7 together with the atoms connecting them form one or more rings; R13 is ???B(R14)???, ???Al(R14)???, ???Ge???, ???Sn???, ???O???, ???S???, ???SO???, ???SO2???, ???N(R14)???, ???CO???, ???P(R14)???, or ???P(O)(R14)???, or an amidoborane radical; wherein: R14, R15 and R16 are identical or different and are a hydrogen atom, a halogen atom, a C1-C20 alkyl group, a C1-C20 fluoroalkyl o
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