Continued from 2-Carb-20
Names of individual ketoaldonic acids are formed by replacing the ending '-ulose' of the corresponding ketose by '-ulosonic acid', preceded by the locant of the ketonic carbonyl group. The anion takes the ending '-ulosonate'. The numbering starts at the carboxy group.
In glycosides derived from ketoaldonic acids, the ending is '-ulosidonic acid', with appropriate ring-size infix, e.g. '-ulopyranosidonic acid'.
Note. The last of the above examples is one of the possible forms of the compound referred to by the three-letter symbol Kdo (formerly the abbreviation KDO, from the previously allowed trivial name ketodeoxyoctonic acid). Similarly the symbol Kdn for the C9 sugar 3-deoxy-D-glycero-D-galacto-non-2-ulopyranosonic acid is widely used.
Esters, lactones, lactams, acyl halides etc. are named by modifying the ending '-ic acid' as described for aldonic acids (2-Carb-20.2).
Note. The parentheses are inserted to distinguish between the ester alkyl group (cited first) and the glycosidic O-alkyl group.
Indol-3-yl D-xylo-hex-5-ulofuranosonate; trivial name isatan B
L-xylo-Hex-2-ulosono-1,4-lactone L-threo-Hex-2-enono-1,4-lactone L-lyxo-Hex-2-ulosono-1,4-lactone
(L-Ascorbic acid is the equilibrium mixture of all three isomers)
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