prov:value
| - or a C1-C40 carbon-containing group, ???NR???2, ???COR??????, ???CO2R??????, ???PR???2, ???P(O)R???2, ???Si(R???)2???O???Si(R???)3???, ???C???O???SiR???3???, CONR???2, ???SOR???, ???SO2R??????, ???SR???, ???OR???, ???NHR??? or ???PHR??? where R??? is a C1-C40 carbon-containing group, and p is an integer ???0, B can link two spacers S to one another, denotes one or more covalent bonds to the suppo
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