Establishing further mechanistic features of multifunctional PROTACs, for example, illuminating the formation of a potential 1:1:1:1 quaternary complex will also be warranted. It is also envisaged that exploration of other chemistries, and tri-or multi-functional core scaffolds will accelerate rapid high-throughput assembly and direct-to-biology testing of larger libraries of multifunctional PROTACs and other proximity-inducing agents. , triplet , quartet , quintet (quint.), multiplet (m), broad (br.), or a combination of the listed splitting patterns. Coupling constants (J) are measured in Hertz . NMR spectra for all compounds were processed using Bruker TopSpin 4.1.1.