| 摘要 |
Dienes were sepd. from other satd. or unsatd. compd. by lig-liq. extn. or extractive distn, using as a solvent a 5-membered heterocyclic compd. contg. 2 nonvicinal heterocyclic N atoms, Me or Et groups on 1 or both N atoms, and optional oxo groups on the ring C atoms.
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