Receptors for 5-hydroxytryptamine (5-HT) are currently classified as 5-HT1-like, 5-HT2 and 5-HT3. The 5-HT1-like class has been further subdivided into 5-HT1A, 5-HT1B, 5-HT1C and 5-HT1D subtypes. Evaluation of the receptor binding profile of sumatriptan (GR 43175), an approved drug for the acute treatment of migraine, strongly suggests that its stimulation of the 5-HT1D receptor subtype is relevant to the reported antimigraine effects. In our screening for 5-HT1D receptor agonists from microbial sources, we discovered a novel indole alkaloid and determined its structure to be 3-(dimethylaminomethyl)-1-(1,1-dimethyl-2-propenyl)indole (1). This note describes the fermentation, isolation, physico-chemical characterization and biochemical properties of 1.