400 MHz in CDCl3
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1H NMR 399.65 MHz C9 H12 O6 0.035 g : 0.5 ml CDCl3 1,2-O-isopropylidene-alpha-D-glucofuranurono-gamma-lactone 
Assign. Shift(ppm)
A 6.007 B 4.958 C 4.852 D 4.832 E 4.571 F 3.40 G *1 1.528 J *1 1.355 ASSIGNED BY H-H AND C-H COSY. J(A,D)=3.7HZ J(B,C)=2.8HZ J(B,E)=4.4HZ J(B,J)=0.5HZ J(E,F)=8.9HZ
Hz ppm Int.2402.47 6.012 253 2398.80 6.003 262 1985.84 4.969 134 1985.35 4.968 136 1983.03 4.962 155 1982.54 4.961 164 1981.45 4.958 159 1980.96 4.957 153 1978.52 4.951 169 1978.03 4.950 168 1940.55 4.856 270 1937.74 4.849 245 1933.11 4.838 258 1929.44 4.828 262 1833.74 4.589 68 1829.47 4.578 75 1825.07 4.567 83 1820.68 4.556 73 1364.99 3.416 93 1356.08 3.394 92 610.96 1.529 999 541.87 1.356 974 541.38 1.355 1000
in CDCl3
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