High-performance liquid chromatographic determination of cardenolides in Digitalis leaves after solid-phase extraction

Kaiser, 1966, Arch. Pharm. (Weinheim), 299, 263, 10.1002/ardp.19662990312

Wichtl, 1982, J. Chromatogr., 234, 503, 10.1016/S0021-9673(00)81897-X

Kreis, 1989, Plant Cell Rep., 5, 442, 10.1007/BF00269637

Lichius, 1989, Sci. Pharm., 57, 439

Fujii, 1989, J. Chromatogr., 479, 319, 10.1016/S0021-9673(01)83346-X

Fujii, 1990, J. Chromatogr., 508, 241, 10.1016/S0021-9673(00)91263-9

Tittel, 1986, Pharm. Ind., 48, 822

Fingerhut, 1992

Krüger, 1984

Lichius, 1991, Planta Med., 57, 159, 10.1055/s-2006-960055

Wichtl, 1978, Pharm. Unserer Zeit, 7, 33, 10.1002/pauz.19780070201