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  _  __    ______              _____     ______  
 | |/ //  /_   _//   ____     |  ___||  /_   _// 
 | ' //    -| ||-   |    \\   | ||__    `-| |,-  
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 |_|\_\\  /_____//  |  __//   |_____||    |_||   
 `-` --`  `-----`   |_|`-`    `-----`     `-`'   
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Text this: Conformational Analysis of (±)-(1,1′-Biindene)-3,3′ -dione, 2,2′,3,3′-Tetrahydro-(1,1′-binaphthalene)-4,4′ (1H,1′H)-dione, and (1,1′-Bibenzosuberene)-5,5′-dione