Mechanistic insight into benzylidene-directed glycosylation reactions using cryogenic infrared spectroscopy Por Chang, C, Greis, K, Prabhu, GRD, Wehner, D, Kirschbaum, C, Ober, K, Torres-Boy, AY, Leichnitz, S, Meijer, G, von Helden, G, Seeberger, PH, Pagel, K