Basimglurant is a potent, selective and orally available modulator of mGlu5 negative allosteric(Kd of 1.1 nM). In competition binding experiments on human recombinant mGlu5, Basimglurant (RG7090) fully displaces [3H]-MPEP with a Ki of 35.6 nM and [3H]-ABP688 with a Ki of 1.4 nM. In HEK293 cells stably expressing human mGlu5, Basimglurant (RG7090) inhibits quisqualate induced Ca2+ mobilization with an IC50 of 7.0 nM and [3H]-inositolphosphate accumulation (IC50 of 5.9 nM).

DL-AP3 is a competitive group I metabotropic glutamate receptor antagonist and inhibitor of phosphoserine phosphatase.

S-Sulfo-L-cysteine sodium salt shows a weak affinity for mGluR1α and mGluR5a at high concentrations and has potential antioxidant activity.