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  ______   _    _      _____     ___      ______  
 /_   _// | || | ||   / ___//   / _ \\   /_   _// 
 `-| |,-  | || | ||   \___ \\  | / \ ||  `-| |,-  
   | ||   | \\_/ ||   /    //  | \_/ ||    | ||   
   |_||    \____//   /____//    \___//     |_||   
   `-`'     `---`   `-----`     `---`      `-`'

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Text this: Asymmetric hetero-diels–alder reaction of Danishefsky’s dienes with α-carbonyl esters catalyzed by an indium(III)–PyBox complex