the content of morphine , codeine and acetyl products and the ratios of morphine to codeine and heroin to acetylcodeine obtained from opium samples of known origin as well as the content of heroin ( diacetylmorphine ) and acetylcodeine and their ratios in illicit heroin samples that have been found to belong to the same source of supply as the known opium samples are used as the basic criteria for a comparison to determine the origin of illicit heroin samples .
C0026549
morphine
C0009214
codeine