A-D-Mannopyranose, 6-

C-5, C-3, C-2, C-4, and C-6 of a-D-mannopyranose. There is very little / -D-mannopyranose present. Peaks 14,15,16,19, and 24 (see Fig. 4) can readily be assigned to a-D-glucopyranose. These results corroborated the findings by other researchers as to the types of carbohydrates present in glucoamylase.104... 

The galactomannan from Trichosporon fermentans contains a (1—>6)-linked a-D-mannopyranose main-chain substituted at the 0-2 atoms with 0-a-D-galactopyranosyl-(l- 2)-0-a-D-mannopyranosyl... 

Initially, the O-phosphonomannan was assigned a repeating unit of 2-0-/8-D-mannopyranosyl-a-D-mannopyranose joined by (1— -phosphoric diester bridges (30). With a- and /8-D-mannopyranosyl units, it... 

Thymidine 5 -(a-D-glucopyranosyl pyrophosphate) (4) and the analogous D-galactose derivative have been isolated from extracts of Pasteurella pseudo tuberculosis.102 The ester of thymidine 5 -pyro-phosphate with a-D-mannopyranose was found in an extract of Strep-tomyces griseus,14,103 and the occurrence of the D-ribosyl ester in the... 

The structures of the classical A and M antigens of Brucella were recently shown to be hompolymers of 4,6-dideoxy-4-formamido-a-D-mannopyranose [102, 103]. The A antigen was an a-l,2-linked polymer, while the M antigen was also linear but was composed of a pentasaccharide repeating unit of four a-1,2- and one a-l,3-linked residues. 

The aldehyde (163), which was prepared from 160 by periodic acid oxidation, was further converted into pseudo-a-D-mannopyranose as follows. Dehydration of 163 with mesyl chloride and pyridine, and subsequent reduction with lithium aluminium hydride gave (3S, 4R, 5S)-3,4,5-tris(benzyloxy)-l-cyclohexene-1-methanol (164). Hydroxyla-tion of 164 with diborane and hydrogen peroxide yielded 4,6-di-0-acetyl-l,2,3-tri-0-... 

T. Uryu, K. Harima, T. Tsuruta, C. Suzuki, N. Yoshino, and C. Schuerch, Ring-opening polymerization of l,2-anhydro-3,4,6-tri-0-benzyl-a-D-mannopyranose and 5,6-anhydro-... 

---