Mass spectral and NMR spectral data of two new designer drugs with an α-aminophenone structure:: 4'-Methyl-α-pyrrolidinohexanophenone and 4'-methyl-α-pyrrolidinobutyrophenone

This study presents and discusses the nuclear magnetic resonance (NMR) spectroscopic and mass spectroscopic data of the new designer drug 4'-methyl-alpha-pyrrolidinobutyrophenone (MPBP) and its homolog 4'-methyl-alpha-pyrrolidinohexanophenone (MPHP) which were seized in 2004 and 2000 in Germany for the first time. The structure elucidation of the aliphatic part of MPBP was carried out by product ion spectroscopy of the immonium ion formed after electron ionization as well as with H-1 and C-13 NMR. Product ion spectroscopy of immonium ions again proved to be a powerful tool to deter-mine the structure of designer drugs and to distinguish between isobaric structures of the alkyl-amino moiety. (C) 2006 Elsevier Ireland Ltd. All rights reserved.