5.9 Acids Derived from Sugars
167
d)
C02H
I
C=O
I
H-C-OH
I
H-C-OH
I
CH20H
D-erythro- Pent2-ulosonic acid
rH02C-C-OH
I
CH2
I
HO-C-H
I
HO-C-H
I
H-C-O
I
H-C-OH
I
CH20H
3-Deoxy-a- D-mannooct-2-ulosonic acid
H ~fro __ ~ H ~_~_~o H ~;ro
H
0
HO
OH
OH 0
L-xylo-Hex -2-uloL- threo-Hex -2-enL-lyxo-Hex -2-ulosono-l A-lactone
ono-l A-lactone
sono-l,4-lactone
~--------~v~---------/
L-Ascorbic acid