5-methoxymethylone 5-methoxymethylone 5-methoxymethylone (also known as 2-a1mp and βk-mmdma) is a chemical compound of the cathinone class which has been sold online as a designer drug. it is the beta-ketone version of 5-methoxy-mdma. the more common name 2-aimp/2-a1mp does not appear to relate to the molecular structure. in comparison with methylone, the two compounds differ by the addition of a methoxy group at the 5th carbon atom of the aromatic ring. the toxicity of this compound is unknown. 5-methoxymethyloneclinical dataroutes ofadministrationoral, insufflationlegal statuslegal status ca: schedule i de: npsg (industrial and scientific use only) uk: class b us: unscheduled but possible analog of methylone or mdma illegal in hungary identifiers iupac name 1-(7-methoxy-benzodioxol-5-yl)-2-methylamino-propan-1-one cas number2230716-98-8 yuniiw4e3l5ny7zchemical and physical dataformulac12h15no4molar mass237.255 g·mol−13d model (jsmol)interactive image smiles cc(nc)c(c1=cc(oc)=c(oco2)c2=c1)=o inchi inchi=inchi=1s/c12h15no4/c1-7(13-2)11(14)8-4-9(15-3)12-10(5-8)16-6-17-12/h4-5,7,13h,6h2,1-3h3key:mpmhrfoozmffbd-uhfffaoysa-n legal status 5-methoxymethylone is listed as an illegal drug under the name 2-a1mp in hungary.