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Legal status
Legal status
  • DE: NpSG (Industrial and scientific use only)
  • UK: Class B
  • 1-(4-Methylphenyl)-2-methylamino-pentan-1-one
CAS Number
Chemical and physical data
Molar mass205.301 g·mol−1
3D model (JSmol)
  • CCCC(NC)C(=O)c1ccc(C)cc1
  • InChI=1S/C13H19NO/c1-4-5-12(14-3)13(15)11-8-6-10(2)7-9-11/h6-9,12,14H,4-5H2,1-3H3

4-Methylpentedrone (also known as 4-MPD and 4-Methyl-α-methylamino-valerophenone), is a stimulant drug of the cathinone class that has been sold online as a designer drug.[1] It is a higher homolog of 4-methylmethcathinone (mephedrone) and 4-methylbuphedrone (4-MeMABP), and the p-methyl derivative of pentedrone. It can also be viewed as the methylamino analog of pyrovalerone.

A related compound, 4-methyl-α-ethylaminopentiophenone (4-MEAP), has been found to be incorrectly sold as 4-methylpentedrone.[2][3]

See also[edit]


  1. ^ "4-Methylpentedrone". Cayman Chemical. Retrieved 28 June 2015.
  2. ^ Hamby D, Burnett A, Jablonsky M, Twamley B, Kavanagh PV, Gardner EA (May 2015). "Identification of 2-(ethylamino)-1-(4-methylphenyl)-1-pentanone (4-MEAP), a New "Legal High" Sold by an Internet Vendor as 4-Methyl Pentedrone". Journal of Forensic Sciences. 60 (3): 721–6. doi:10.1111/1556-4029.12712. PMID 25923458. S2CID 19336157.
  3. ^ Uchiyama N, Matsuda S, Kawamura M, Shimokawa Y, Kikura-Hanajiri R, Aritake K, et al. (October 2014). "Characterization of four new designer drugs, 5-chloro-NNEI, NNEI indazole analog, α-PHPP and α-POP, with 11 newly distributed designer drugs in illegal products". Forensic Science International. 243: 1–13. doi:10.1016/j.forsciint.2014.03.013. PMID 24769262.