Analytical pure solvents, cyclohexane (CHE), ethanol (EtOH), methanol (MeOH), acetonitrile (MeCN) and bis-(trimethylsilyl)trifluoroacetamide + tertbutyldimethylchlorosilane (MSTFA + 1% TMCS > 95%) were purchased from Sigma-Aldrich (Burlington, MA, USA) and used as received.
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