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Journal of Chromatography. B, Biomedical Sciences and Applications|May 23, 1997
Determination of a novel growth hormone secretagogue (MK-677) in human plasma at picogram levels by liquid chromatography with atmospheric pressure chemical ionization tandem mass spectrometryM L Constanzer, C M Chavez-Eng, B K MatuszewskiJournal of Chromatography. B, Biomedical Sciences and Applications|September 24, 1998
Determination of a novel selective inhibitor of type 1 5alpha-reductase in human plasma by liquid chromatography with atmospheric pressure chemical ionization tandem mass spectrometryM L Constanzer, C M Chavez-Eng, B K MatuszewskiAnalytical Chemistry|March 25, 1998
Matrix effect in quantitative LC/MS/MS analyses of biological fluids: a method for determination of finasteride in human plasma at picogram per milliliter concentrationsB K Matuszewski, M L Constanzer, C M Chavez-EngJournal of Chromatography. B, Biomedical Sciences and Applications|November 25, 2000
Determination of rofecoxib (MK-0966), a cyclooxygenase-2 inhibitor, in human plasma by high-performance liquid chromatography with tandem mass spectrometric detectionC M Chavez-Eng, M L Constanzer, B K MatuszewskiJournal of Pharmaceutical and Biomedical Analysis|June 1, 1997
Determination of a substance P antagonist in human plasma and urine using high-performance liquid chromatography with ultraviolet absorbance and tandem mass spectrometric detectionJ Zagrobelny, C Chavez, M L Constanzer, et al.Journal of Chromatography. B, Biomedical Sciences and Applications|November 21, 1998
Development of high-performance liquid chromatography-tandem mass spectrometric methods for the determination of a new oxytocin receptor antagonist (L-368,899) extracted from human plasma and urine: a case of lack of specificity due to the presence of metabolitesB K Matuszewski, C M Chavez-Eng, M L ConstanzerJournal of Chromatography. B, Biomedical Sciences and Applications|March 28, 1997
Picogram determination of a novel dopamine D4 receptor antagonist in human plasma and urine by liquid chromatography with atmospheric pressure chemical ionization tandem mass spectrometryC M Chavez-Eng, M L Constanzer, B K MatuszewskiJournal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences|February 28, 2002
High-performance liquid chromatographic-tandem mass spectrometric evaluation and determination of stable isotope labeled analogs of rofecoxib in human plasma samples from oral bioavailability studiesC M Chavez-Eng, M L Constanzer, B K MatuszewskiJournal of Pharmaceutical Sciences|September 1, 1984
Analytical methods for the determination of sulindac and metabolites in plasma, urine, bile, and gastric fluid by liquid chromatography using ultraviolet detectionD G Musson, W C Vincek, M L Constanzer, et al.Journal of Chromatography|April 6, 1990
Development of direct stereoselective and non-stereoselective assays in biological fluids for the enantiomers of a thieno[2,3-b]thiopyran-2-sulfonamide, a topically effective carbonic anhydrase inhibitorB K Matuszewski, M L Constanzer, G A Hessey, et al.Pageof 4