4-Hydroxy-N,N-dibutyltryptamine (4-HO-DBT) is a psychedelic drug belonging to the tryptamine family. It is found either as its crystalline hydrochloride salt or as an oily or crystalline base. 4-HO-DBT was first made by the chemist Alexander Shulgin and reported in his book TiHKAL. Shulgin reported a dosage of 20mg orally to be without effects. However this compound has subsequently been sold as a "research chemical" and anecdotal reports suggest that at higher doses 4-HO-DBT is indeed an active hallucinogen, although somewhat weaker than other similar tryptamine derivatives.
Several different isomers of this compound could potentially be made (see DBT for a fuller discussion) but of these only the isobutyl isomer 4-HO-DIBT has been synthesised (mp 152-154 °C) and was also found to be inactive at a 20mg dose.
Day by day I'm falling more in love with you
And day by day my love seems to grow
There isn't any end to my devotion
It's deeper dear by far than any ocean
I find that day by day you're making all my dreams come true
And (So) come what may I want you to know
I'm (That I am) yours alone, and I'm in love (in love) to stay
As we go through the years day by day
(I said, "Day by day")