發送短信 : An aldol - Bislactonization route to α-methylene bis-γ-butyrolactones

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