The ring formed by the dimerization of two zwitterionic 4-glutarato-N,N-diisopropyltryptamine molecules with graph set notation of
R22(28). The image shown is from the methanol solvate. Hydrogen bonds are shown as dashed lines. H atoms not involved in hydrogen bonding are omitted for clarity. Symmetry code: (i) 1 − x, 1 − y, 1 − z.