Chemical examination of the methanolic extract from the stem bark of Daphne aurantiaca led to the isolation of two innovanoside dimers (1 and 2) with an unusual four-membered cyclobutane ring, together with the isoinnovanoside 3. Their chemical structures and configurations were elucidated by extensive spectral analysis and synthesis.
The article was received on 11 Mar 2013, accepted on 26 Apr 2013 and first published on 01 May 2013
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