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Legal status
Legal status
CAS Number
PubChem CID
Chemical and physical data
Formula C15H21NO
Molar mass 231.333 g/mol
3D model (JSmol)
Chirality Racemic mixture

4'-Methyl-α-pyrrolidinobutiophenone or MPBP is a stimulant compound which has been reported as a novel designer drug.[1][2] It is closely related to pyrovalerone, being simply its chain-shortened homologue.

See also[edit]


  1. ^ Peters, FT; Meyer, MR; Fritschi, G; Maurer, HH (2005). "Studies on the metabolism and toxicological detection of the new designer drug 4'-methyl-alpha-pyrrolidinobutyrophenone (MPBP) in rat urine using gas chromatography-mass spectrometry". Journal of Chromatography B. 824 (1–2): 81–91. PMID 16046201. doi:10.1016/j.jchromb.2005.07.003. 
  2. ^ Peters, FT; Meyer, MR; Theobald, DS; Maurer, HH (2008). "Identification of cytochrome P450 enzymes involved in the metabolism of the new designer drug 4'-methyl-alpha-pyrrolidinobutyrophenone". Drug metabolism and disposition: the biological fate of chemicals. 36 (1): 163–8. PMID 17962373. doi:10.1124/dmd.107.017293.