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Lu, Nan; Wang, Huatian . (2013). Theoretical study of enantiomeric and geometric control in chiral guanidine-catalyzed asymmetric 1,4-addition of 5 <i>H</i> -oxazol-4-ones. International Journal of Quantum Chemistry, 113(20), 2267–2276. doi:10.1002/qua.24447 
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