| abstract |
A white fungus of genus Sphingomonas, when washed with acetone and then extracted with alcohol or alcohol-water mixture yields a shingoglycolipid represented by the following formula: n n n where, R 1 represents a sugar portion of a single uronic acid or one to four hexoses of uronic acid, glucosamine, galactose and/or mannose; R 2 represents an alkyl group which may have a cycloalkyl group, an alkenyl group or an alkynyl group; and R 3 represents on alkyl group. |