5-Methoxy-Methylone (also known as 2-A1MP and ¦Âk-MMDMA) is a chemical compound of the cathinone class . 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.