Ilyl) trifluoroacetamide (MSTFA) and trimethylchlorosilane (TMCS) have been purchased from Sigma-Aldrich Corp (St Louis, MO,
Ilyl) trifluoroacetamide (MSTFA) and trimethylchlorosilane (TMCS) have been purchased from Sigma-Aldrich Corp (St Louis, MO, USA). Methylhydroxylamine hydrochloride and pyridine had been purchased from Aladdin Industrial, Inc (People's Republic of…