The synthesis of ring systems related to morphine; 9,10-dioxo-13-cyanomethyl-5,8,9,10,13,14-hexahydro-phenanthrene.
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M
M
NEWHALL
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WF
D009020:Morphine; D010616:Phenanthrenes
D010616:Phenanthrenes; C031181:phenanthrene; D009020:Morphine