A member of the class of indoles that is 4,5,6,7-tetrahydro-1H-indole substituted by 4-(carboxymethyl)-1,3-thiazol-2-yl, phenyl, and 2-methylbutan-2-yl groups at positions 1, 2 and 5, respectively. It is an experimental compound used for the treatment of proximal spinal muscular atrophy.