eem (psychedelic) eem (psychedelic) eem (2,4-diethoxy-5-methoxyamphetamine) is a lesser-known substituted amphetamine. it is a diethoxy-methoxy analog of trimethoxyamphetamine (tma-2). eem was first synthesized by alexander shulgin. in his book pihkal, both the dosage and duration are unknown. eem produces few to no effects. very little data exists about the pharmacological properties, metabolism, and toxicity of eem. eem names preferred iupac name 1-(2,4-diethoxy-5-methoxyphenyl)propan-2-amine identifiers cas number 23693-33-6 y 3d model (jsmol) interactive image chemspider 21106297 y pubchem cid 44719558 unii eyl9me7kpm y comptox dashboard (epa) dtxsid20660362 inchi inchi=1s/c14h23no3/c1-5-17-12-9-14(18-6-2)13(16-4)8-11(12)7-10(3)15/h8-10h,5-7,15h2,1-4h3 ykey: safdwwqygoogmx-uhfffaoysa-n yinchi=1/c14h23no3/c1-5-17-12-9-14(18-6-2)13(16-4)8-11(12)7-10(3)15/h8-10h,5-7,15h2,1-4h3key: safdwwqygoogmx-uhfffaoyaw smiles ccoc1cc(occ)c(cc1oc)cc(c)n properties chemical formula c14h23no3 molar mass 253.342 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). y verify (what is yn ?) infobox references