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Wu X, Dai X, Fang H, Nie L, Chen J, Cao W, Zhao G. One-pot three-component syntheses of indoloquinolizidine derivatives using an organocatalytic Michael addition and subsequent Pictet–Spengler cyclization. Chemistry. 2011 Sep 12;17(38):10510–4. doi: 10.1002/chem.201101468. PMID: 22003505. |