发明公开
EP3018133A1 DIHYDROETORPHINES 审中-公开
DIHYDROETORPHIN

DIHYDROETORPHINES
摘要:
The present invention provides a process for the preparation of a compound of formula (VI), or a salt or derivative thereof,

wherein R 1 and R 2 are independently C 1-8 alkyl and * represents a stereocentre.
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