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本文研究了在手性位移试剂Eu(tfc)_3存在下,绿柱虫二萜二醇A(clavudiol A)(⊥)中各甲基的化学位移变化,并对19-甲基和20-甲基的~1H-NMR进行了归属。
In this paper, we studied the chemical shifts of methyl groups in the methyltrimethylammonium diterpenediol A (⊥) in the presence of Eu (tfc) 3, a chiral shift reagent. The effects of 19-methyl and 20- The ~ 1H-NMR group was assigned.