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Phytochemical investigation of Clematis armandii (Ranunculaceae) has resulted in the isolation of two new macrocyclic compounds named clemoarmanosides A (1) and B (2), along with two known macrocyclic compounds berchemolide (3) and clemochinenoside B (4).The structures of 1 and 2 were elucidated on the basis of spectroscopic data and chemical methods.In addition, several 13 C-NMR data of 4 were amended by 2D-NMR spectra analysis in this paper.
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Yan et al. (2006) studied this question.
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