3554-77-6

Upstream product

• 108-24-7 acetic anhydride 

Downstream Products

• 66657-29-2 3-deoxy-1,5,6-tri-O-methyl-3-nitro-muco-inositol 
• 66657-29-2 5-deoxy-1,2,3-tri-O-methyl-5-nitro-scyllo-inositol 
• 66657-29-2 DL-1-deoxy-3,4,5-tri-O-methyl-1-nitro-myo-inositol 
• 63028-93-3 Acetic acid (2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl ester 
• 63028-93-3 Acetic acid (2S,3R,4S,5R,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl ester 

Relevant academic research and scientific papers

THE OCCURRENCE OF L-GALACTOSE IN SNAIL GALACTANS

The occurrence of L-galactose (L-Gal) was investigated in twelve preparations of snail galactans from nine different species.L-Gal (11-15percent) was found not only in members of the family Helicidae, a highly developed group among the Pulmonata, but was detected also in a galactan of the oldest phylogenetic subclass of snails in the Prosobranchiata.To determine the position of the L-Gal residues, the galactans of Arianta arbustorum, Cepaea nemoralis, and Helix pomatia were methylated and hydrolysed, and the partially methylated Gal derivatives were isolated.Each derivative was O-demethylated and the ratio of D- and L-galactose was determined by g.l.c. of the trifluoroacetylated methyl glycosides using a chiral stationary phase.L-Gal (22-34percent) was detected only in the tetra-O-methyl fractions, and hence L-Gal occupies exclusively terminal non-reducing positions.