2,5-dimethoxy-4-methylphenylcyclopropylamine 2,5-dimethoxy-4-methylphenylcyclopropylamine 2,5-dimethoxy-4-methylphenylcyclopropylamine (dmcpa) is a lesser-known psychedelic drug and a substituted amphetamine. dmcpa was first synthesized by alexander shulgin. in his book pihkal, the dosage range is listed as 15–20 mg and the duration is listed as 4–8 hours. dmcpa produces open-eye visuals, anorexia, and psychedelic dreams. shulgin gives it a +++ on the shulgin rating scale. 2,5-dimethoxy-4-methylphenylcyclopropylamine names preferred iupac name 2-(2,5-dimethoxy-4-methylphenyl)cyclopropan-1-amine identifiers cas number 714903-64-7 y69854-49-5 (non-specific) y 3d model (jsmol) interactive image chembl chembl13530 y chemspider 2285590 y pubchem cid 3017965 unii u2yc8rfk7b y comptox dashboard (epa) dtxsid10990120 inchi inchi=1s/c12h17no2/c1-7-4-12(15-3)9(6-11(7)14-2)8-5-10(8)13/h4,6,8,10h,5,13h2,1-3h3 ykey: hyvppecpqrbjeq-uhfffaoysa-n yinchi=1/c12h17no2/c1-7-4-12(15-3)9(6-11(7)14-2)8-5-10(8)13/h4,6,8,10h,5,13h2,1-3h3key: hyvppecpqrbjeq-uhfffaoyan smiles o(c1c(cc(oc)c(c1)c2cc2n)c)c properties chemical formula c12h17no2 molar mass 207.273 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references legality united kingdom this substance is a class a drug in the drugs controlled by the uk misuse of drugs act. pharmacology very little data exists about the pharmacological properties, metabolism, and toxicity of dmcpa.