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Total syntheses of the natural products kelsoene and preussin are comprehensively reviewed. Kelsoene is a sesquiterpene with a unique tricyclo[6.2.0.02,6]decane skeleton. It contains six stereogenic centers the selective construction of which has been addressed differently in the five syntheses known to date. Three syntheses employ an intermolecular [2+2]-photocycloaddition reaction as key step. One...
The ongoing technical development over the last years made the laser one of the most important tools in endourology and daily urological practice. Today several laser types have been introduced for soft tissue surgery and stone treatment. To understand the differences between these lasers available for clinical use, one has to be aware of the possible variables the urologist has to deal with. In this...
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