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Novel Prolinamide Organocatalysts Based on Calix[4]arene Scaffold for the Enantioselective Direct Aldol Reaction. Li, Zheng-Yi; Lu, Cheng-Xi; Huang, Guoli; Ma, Jie-Jie; Sun, Hongsheng; Wang, Leyong; Pan, Yi. Letters in Organic Chemistry, 2010, 7 (6), 461-466.
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dx.doi.org/10.2174/157017810791824919