Kazuhiko Sagara

A simultaneous determination of norephedrine, pseudoephedrine, ephedrine and methylephedrine in Ephedrae Herba and oriental pharmaceutical preparations by ion-pair high-performance liquid chromatography.

Kazuhiko Sagara, Toshiyuki Oshima, Tetsuo Misaki · Chemical and Pharmaceutical Bulletin · 1983 · 58 citations · Full text

Pharmacy, Pharmaceutical Analysis, Pharmacology +17

Simultaneous determination of berberine, palmatine and coptisine in crude drugs and oriental pharmaceutical preparations by ion-pair high-performance liquid chromatography.

Tetsuo Misaki, Kazuhiko Sagara, Mitsuharu Ojima et al. · Chemical and Pharmaceutical Bulletin · 1982 · 46 citations · Full text

Pharmacy, Pharmaceutical Analysis, Pharmacology +15

Determination of geniposide, gardenoside, geniposidic acid and genipin-1-β-gentiobioside in Gardenia jasminoides by high-performance liquid chromatography

Toshiyuji Oshima, Kazuhiko Sagara, Tsuguchika Yoshida et al. · Journal of Chromatography A · 1988 · 42 citations

Life Sciences, Botany, Plant Sciences +5

Three flavonol glycosides from Epimedium koreanum

Yuji Ito, Fusayoshi Hirayama, Keiichi Suto et al. · Phytochemistry · 1988 · 35 citations

Life Sciences, Biochemistry, Botany +7

Application of ion-pair high performance liquid chromatography for analysis of hyoscyamine and scopolamine in solanaceous crude drugs.

Toshiyuki Oshima, Kazuhiko Sagara, Tong Yu-Yi et al. · Chemical and Pharmaceutical Bulletin · 1989 · 32 citations · Full text

Pharmacy, Pharmaceutical Analysis, Pharmacology +16