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Ref.\u2005[1b]."},{"key":"e_1_2_2_46_2","unstructured":"\u00a0"},{"key":"e_1_2_2_47_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo00085a004"},{"key":"e_1_2_2_48_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo9911544"},{"key":"e_1_2_2_49_2","doi-asserted-by":"publisher","DOI":"10.15227\/orgsyn.083.0005"},{"key":"e_1_2_2_50_2","unstructured":"Commercially available from Aldrich. 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