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

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Text this: Antiviral carboxylic acids and naphthoquinones from the stems of Rhinacanthus nasutus