title: The quantitative determination of some mitragyna oxindole alkaloids after separation by thin-layer chromatograppy. I. Ultraviolet spectrophotometry.
mesh_terms: D000470:Alkaloids / Q000032:analysis*; D055598:Chemical Phenomena; D002621:Chemistry; D002855:Chromatography, Thin Layer; D007211:Indoles / Q000032:analysis*; D008961:Models, Structural; D012822:Silicon Dioxide; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D000470:Alkaloids; D007211:Indoles; D012822:Silicon Dioxide