G Protein

G15 is a high affinity and selective G-protein-coupled estrogen receptor (GPER/GPR30) antagonist with a Ki of 20 nM.

CID16020046 is a selective GPR55 antagonist, inhibiting GPR55 constitutive activity with IC50 of 0.15 μM in yeast. It demonstrates weak activity against a broad spectrum of other GPCRs, ion channels, kinases, and nuclear receptor.