lespedamine lespedamine lespedamine is an indole alkaloid and substituted tryptamine present in the plant lespedeza bicolor. the alkaloid bears a close structural resemblance to the psychedelic alkaloid dimethyltryptamine and was speculated to have psychoactivity by alexander shulgin. no reports on lespedamine's biological activity have been published. lespedamine names preferred iupac name 2-(1-methoxy-1h-indol-3-yl)-n,n-dimethylethan-1-amine identifiers cas number 4335-93-7 3d model (jsmol) interactive image chemspider 9313707 pubchem cid 11138594 unii 6w73qan9ck y inchi inchi=1s/c13h18n2o/c1-14(2)9-8-11-10-15(16-3)13-7-5-4-6-12(11)13/h4-7,10h,8-9h2,1-3h3key: dxtztyqdnuhcab-uhfffaoysa-n smiles o(n2c1ccccc1c(c2)ccn(c)c)c properties chemical formula c13h18n2o molar mass 218.300 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references