methylenedioxybutylamphetamine methylenedioxybutylamphetamine methylenedioxybutylamphetamine (mdbu or 3,4-methylenedioxy-n-butylamphetamine) is a lesser-known psychedelic drug. it is also the n-butyl derivative of 3,4-methylenedioxyamphetamine (mda). mdbu was first synthesized by alexander shulgin. in his book pihkal, the minimum dosage is listed as 40 mg, and the duration unknown. mdbu produces few to no effects. very little data exists about the pharmacological properties, metabolism, and toxicity of mdbu. methylenedioxybutylamphetamine names preferred iupac name n-butan-1-amine identifiers cas number 74698-38-7 3d model (jsmol) interactive image chemspider 17334605 pubchem cid 16206440 unii 934e9ju8h5 comptox dashboard (epa) dtxsid40583322 inchi inchi=1s/c14h21no2/c1-3-4-7-15-11(2)8-12-5-6-13-14(9-12)17-10-16-13/h5-6,9,11,15h,3-4,7-8,10h2,1-2h3key: rdxvrdcqditvdv-uhfffaoysa-n smiles c1=c2c(=cc=c1cc(c)ncccc)oco2 properties chemical formula c14h21no2 molar mass 235.327 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references