prov:value
| - wherein X is a linking group-; wherein n is an integer from 0 to 4, inclusive; Y is ???(CR1R2)a???, wherein a is 0, 1, or 2; and Z is ???(CR3R4)b???, wherein b is 0, 1, or 2, provided that a+b is less than or equal to 3; and q1, q2, q3, q4, r, each R1, each R2, each R3, and each R4 are independently selected from hydrogen; linear, branched, cyclic, or polycyclic C1???C20 alkyl; aromatic groups; ha
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