Alexander Shulgin's drew me this diagram toward the end of his life, due to his failing vision the molecule was almost a blind contour, which resulted in the diisopropylethylamine side chain being attached to the indole 2-position as opposed to the 3-position. Though I imagine this was drawn in error I can't help but see it as a clue, maybe a result of a subconscious interest in the 2-isotryptamines, a synthetically challenging and pharmacologically promising area.
