4-aco-dpt 4-aco-dpt 4-acetyloxy-n,n-dipropyltryptamine (or 4-aco-dpt) is a tryptamine derivative. 4-aco-dpt has been sold as a designer drug. it is an ester of 4-ho-dpt, a psychedelic tryptamine first synthesized by alexander shulgin. anecdotal reports indicate that 4-aco-dpt exerts psychoactive effects in humans, however, the pharmacology of 4-aco-dpt has not been examined. 4-aco-dpt names preferred iupac name 3--1h-indol-4-yl acetate other names depracetin identifiers cas number 1445751-75-6 3d model (jsmol) interactive image chemspider 30647009 pubchem cid 73553809 unii 1l0r752595 inchi inchi=1s/c18h26n2o2/c1-4-10-20(11-5-2)12-9-15-13-19-16-7-6-8-17(18(15)16)22-14(3)21/h6-8,13,19h,4-5,9-12h2,1-3h3key: krugabvnkkkcjn-uhfffaoysa-n smiles cccn(ccc)ccc1=cnc2=c1c(=cc=c2)oc(=o)c properties chemical formula c18h26n2o2 molar mass 302.418 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references