Structure of a GnRHR folding template. IN3 is the trivial designation of (2S)-2-[5-[2-(2-azabicyclo[2.2.2]oct-2-yl)-1,1-dimethyl-2- oxoethyl]-2-(3,5-dimethylphenyl)-1H-indol-3-yl]-N-(2-pyridin-4-ylethyl) propan-1-amine. Synthesized by Drs. Wallace T. Ashton and Mark Goulet (Merck & Co., Inc.).