“…Melting-point measurements were performed on a Stanford Research Systems OptiMelt (MPA 100). Succinic acid mono-2′,3′- O -isopropylidene-uridin-5′yl ester 1 [ 27 ], 2′,3′-di- O - tert -butyldimethylsilyluridine 2a [ 32 ], 2′,3′- O -isopropylideneuridine-5′-carboxylic acid 3 [ 31 ], 2′,3′- O -di- O - tert -butyldimethylsilyluridine-5′-carboxylic acid 4 [ 28 ], 4-aminophenyl 2,3,4,6-tetra- O -acetyl-1-thio-β- d -glucopyranoside 5 , 4-aminophenyl 2,3,4,6-tetra- O -acetyl-1-thio-β- d -galactopyranoside 6 [ 33 ], and DMTMM [ 46 ] were prepared according to the respective published procedures.…”