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

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發送短信 : Organocatalytic asymmetric mannich, formal [4+1] and [4+2] annulation reactions