参考文献:Organic Letters, 2008, vol. 10, # 9, p. 1715-1718;Australian Journal of Chemistry, 2015, vol. 68, # 2, p. 254-255
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参考文献:Chemistry of Heterocyclic Compounds (New York, NY, United States), 1989, vol. 25, # 2, p. 205-208;Khimiya Geterotsiklicheskikh Soedinenii, 1989, # 2, p. 249-252
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参考文献:Patent: WO2007/113232, 2007, A1. Location in patent: Page/Page column 106-107