Dihydrodesoxycodeine on:
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Desocodeine is a semi-synthetic opioid which is the penultimate intermediate in the manufacture of 
desomorphine
Desomorphine is a semi-synthetic opioid commercialized by Roche, with powerful, fast-acting effects, such as sedation and analgesia. It was first discovered and patented by a German team working for Knoll in 1920 but was not generally recognize ...
from codeine.
References
Opioids {{Analgesic-stub