The solid-state structures of two solvated forms of 4-glutarato- N , N -diisopropyltryptamine were determined by single-crystal X-ray diffraction, namely, 5-[(3-{2-[bis(propan-2-yl)azaniumyl]ethyl}-1 H -indol-4-yl)oxy]-5-oxopentanoate methanol monosolvate, C 21 H 30 N 2 O 4 ·CH 3 OH, and the analogous ethanol monosolvate, C 21 H 30 N 2 O 4 ·C 2 H 6 O. In both compounds, the 4-glutarato- N , N...