4-HO-DSBT
4-HO-DsBT (4-hydroxy-"N,N"-di-"sec"-butyltryptamine) is a tryptamine derivative which acts as a serotonin receptor agonist. It was first made by Alexander Shulgin and is mentioned in his book TiHKAL, but was never tested by him. However it has subsequently been tested "in vitro" and unlike the "n"-butyl and isobutyl isomers which are much weaker, the "s"-butyl derivative retains reasonable potency, with a similar 5-HT receptor affinity to MiPT but better selectivity over the 5-HT and 5-HT subtypes.