PMID- 2768393 OWN - NLM STAT- MEDLINE DCOM- 19890925 LR - 20190629 VI - 474 IP - 1 DP - 1989 Jul 14 TI - Use of thermospray liquid chromatography-mass spectrometry for characterization of reactive metabolites of 3'-hydroxyacetanilide, a non-hepatotoxic regioisomer of acetaminophen. PG - 209-22 AB - 3'-Hydroxyacetanilide (AMAP) is a non-hepatotoxic regioisomer of acetaminophen that nonetheless does form reactive metabolites that are trapped as glutathione thioether adducts. These reactive intermediates are, 4-acetamido-o-benzoquinone, 2-acetamido-p-benzoquinone and N-acetyl-3-methoxy-p-benzoquinone. Thermospray liquid chromatography mass spectrometry (TSP LC-MS) was used to characterize products of reactions of these reactive compounds with cysteine or N-acetyl-cysteine. The TSP spectra of the mono- and bis-thioether adducts showed protonated molecular ions and characteristic fragmentation patterns. The chromatographic resolution together with the MS selectivity allowed for unequivocal identification of these conjugates in the urine of mice treated with AMAP. FAU - Rashed, M S AU - Rashed MS AD - Department of Medicinal Chemistry, University of Washington, Seattle 98195. FAU - Nelson, S D AU - Nelson SD LA - eng GR - GM25418/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - Netherlands TA - J Chromatogr JT - Journal of chromatography JID - 0427043 RN - 362O9ITL9D (Acetaminophen) RN - K848JZ4886 (Cysteine) RN - WYQ7N0BPYC (Acetylcysteine) SB - IM MH - Acetaminophen/*metabolism/pharmacology/urine MH - Acetylcysteine/metabolism MH - Animals MH - Chemical Phenomena MH - Chemistry MH - Chromatography, High Pressure Liquid/methods MH - Cysteine/metabolism MH - Isomerism MH - Liver/*drug effects MH - Magnetic Resonance Spectroscopy MH - Male MH - Mass Spectrometry/methods MH - Mice EDAT- 1989/07/14 00:00 MHDA- 1989/07/14 00:01 CRDT- 1989/07/14 00:00 PHST- 1989/07/14 00:00 [pubmed] PHST- 1989/07/14 00:01 [medline] PHST- 1989/07/14 00:00 [entrez] AID - 10.1016/s0021-9673(01)93916-0 [doi] PST - ppublish SO - J Chromatogr. 1989 Jul 14;474(1):209-22. doi: 10.1016/s0021-9673(01)93916-0.