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Three rare spirocyclohexadienone‐type neolignans, magnoflorins A–C (1–3), and three known analogs (4–6), were isolated from the leaves of Magnolia liliiflora. Magnoflorin D (4) was obtained from natural resources for the first time. The chemical structures and absolute configurations of 1–4 were elucidated through detailed analysis of HR‐ESI‐MS, IR, 1H, 13C, and 2D NMR, and ECD experiments. The absolute...
Accurate identification of species from timber is an essential step to help control illegal logging and forest loss. However, current approaches to timber identification based on morphological and anatomical characteristics have limited species resolution. DNA barcoding is a proven tool for plant species identification, but there is a need to build reliable reference data across broad taxonomic and...
Background
Systematic reviews have focused on sperm recovery and post‐thaw parameters after cryopreservation, but there is no information on the associated clinical outcomes. In recent years, an increasing number of studies have reported cryopreservation of a single sperm due to the importance of fertility preservation.
Objectives
To assess whether the cryopreservation of single human spermatozoa...
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