the separation of the five principal alkaloids ( morphine , codeine , thebaine , noscapine and papaverine ) , three minor alkaloids ( laudanosine , cryptopine and narceine ) , meconic acid and some unidentified constituents in gum opium samples has been achieved on a reversed-phase phenyl column by gradient high-performance liquid chromatography using a simple and inexpensive mobile phase system .
C0026549
morphine
C0009214
codeine