5.13 Oligosaccharides
CH20H
OH
H
H~OOH
H H HO O~-CH2
H
0 H
H
OH
H
HO
H HO 0
HOH2C~
H HO
H
CH20H
HO H
sequentially:
a-o-Galactopyranosyl-{1 --76)a-o-glucopyranosyl f3- 0-fructofuranoside
[a- o-Galp-{1 --7 6)-a-o-Glcp(1 H 2)-f3-o-Fruf1
related to Glucopyranose:
f3-0-Fructofuranosyl a-o-galactopyranosyl-( 1 --7 6)-a-o-glucopyranoside (trivially: Raffinose)
S.13.3
Polysaccharides (Glycans)
~
:H20~H
OH
H
HO
H HO 0
HOH2C~
H HO
H
CH2
HO H I
o
HOH2C~
H HO
H
CH2
HO HI
o
HOH2C~
H HO
H
CH20H
HO H
175
f3-o-Fructofuranosyl-(2 --7 1)f3-o-fructofuranosyl-(2 --71)f3- 0-fructofuranosyl-a- o-glucopyranoside
(trivially: Nystose)
[f3-o-Fruf-(2 --7 1)-f3-o-Fruf(2 --71)-f3-o-Fruf-(2 H 1)-a-oGlcp]
Polysaccharides, finally, are subsumed under the generic term glycan
whereas structurally defined representatives of this compound class are
characterized by the ending ... an which should also be used when creating new trivial names in this field. For homopolysaccharides the ... ose
ending is simply changed to .•. an; for homopolysaccharides substituted in
a defined manner it is the ... ose ending of the backbone-glycose which is
to be changed to ... an, if needed with a connectivity descriptor preceding
the glycan name: xylose --7 xylan, mannose --7 mannan, etc.