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  _  __   __   __   _    _      ___     __   __  
 | |/ //  \ \\/ // | \  / ||   / _ \\   \ \\/ // 
 | ' //    \ ` //  |  \/  ||  / //\ \\   \   //  
 | . \\     | ||   | .  . || |  ___  ||  / . \\  
 |_|\_\\    |_||   |_|\/|_|| |_||  |_|| /_//\_\\ 
 `-` --`    `-`'   `-`  `-`  `-`   `-`  `-`  --`

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Text this: Synthesis of oxacyclic scaffolds via dual ruthenium hydride/Brønsted acid-catalyzed isomerization/cyclization of allylic ethers