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

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發送短信 : A direct catalytic asymmetric Mannich-type reaction via a dinuclear zinc catalyst: Synthesis of either anti- or syn-α-hydroxy-β-amino ketones