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 ______      ___     _    _      ___      ______  
|      \\   / _ \\  | |  | ||   / _ \\   /_____// 
|  --  //  | / \ || | |/\| ||  / //\ \\  `____ `  
|  --  \\  | \_/ || |  /\  || |  ___  || /___//   
|______//   \___//  |_// \_|| |_||  |_|| `__ `    
`------`    `---`   `-`   `-` `-`   `-`  /_//     
                                         `-`

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Text this: Facile metal-mediated synthesis of macrocyclic diselenoethers