Nozomu Koseki

Development and validation for high selective quantitative determination of metformin in human plasma by cation exchanging with normal-phase LC/MS/MS

Nozomu Koseki, Hiroto Kawashita, Miyuki Niina et al. · Journal of Pharmaceutical and Biomedical Analysis · 2004 · 100 citations

Pharmacy, Pharmaceutical Analysis, Pharmaceutics +16

Development and validation of a method for quantitative determination of valsartan in human plasma by liquid chromatography-tandem mass spectrometry

Nozomu Koseki, Hiroto Kawashita, Hisanori Hara et al. · Journal of Pharmaceutical and Biomedical Analysis · 2007 · 91 citations

Pharmacy, Pharmaceutical Analysis, Pharmacology +14

Three‐bond ¹³C¹H coupling constants for chrysanthemic acid and phenothrin metabolites: Detection by two‐dimensional long‐range ¹³C¹H <i>J</i>‐resolution spectroscopy

Tetsu Ando, Nozomu Koseki, Robert F. Toia et al. · Magnetic Resonance in Chemistry · 1993 · 27 citations

Natural Sciences, Biochemistry, Chemistry +12

Simultaneous quantitative determination of cyclosporine A and its three main metabolites (AM1, AM4N and AM9) in human blood by liquid chromatography/mass spectrometry using a rapid sample processing method

Nozomu Koseki, Akinori Nakashima, Yusuke Nagae et al. · Rapid Communications in Mass Spectrometry · 2006 · 25 citations

Pharmacy, Pharmaceutical Analysis, Pharmacology +17

¹³C NMR assignments of brassinosteroids by two‐dimensional techniques

Tetsu Ando, Masakazu Aburatani, Nozomu Koseki et al. · Magnetic Resonance in Chemistry · 1993 · 24 citations

Life Sciences, Botany, Plant Sciences +14