| Unique spirocyclopiperazinium salt. Part 2: synthesis and st... 
 [Wang, Xin; Gao, Feng-Li; Piao, Hong-Bin; Cheng, Tie-Ming; Li, Run-Tao Bioorganic and Medicinal Chemistry Letters, 2003 , vol. 13, # 10 p. 1729 - 1732]
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                            | Etherification of glycerol with ethanol over solid acid cata... 
 [Pariente, Stephane; Tanchoux, Nathalie; Fajula, Franois Green Chemistry, 2009 , vol. 11, # 8 p. 1256 - 1261]
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                            | Etherification of glycerol with ethanol over solid acid cata... 
 [Pariente, Stephane; Tanchoux, Nathalie; Fajula, Franois Green Chemistry, 2009 , vol. 11, # 8 p. 1256 - 1261]
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