發送短信 : Asymmetric synthesis of furofurans

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