A composition comprising a mixture of two or more stereoisomers of a synthetic charged isoprenoid glycolipid of Formula (I), or a pharmaceutically acceptable salt thereof, in which n is 0 or 1, R and R are independently hydrogen or hydroxyl, each Y is independently hydrogen or a sulfate group, and wherein at least one Y is a sulfate group, and less than 25% of the synthetic charged isoprenoid glycolipid molecules in the mixture comprise an archaeol moiety of the configuration (R)-2,3-bis(((3R,7R,11R)-3,7,11,15-tetramethylhexadecyl)oxy) propan-1-ol. Further provided are archaeosomes and immunogenic compositions comprising the composition, use of the composition as an adjuvant or immunostimulant, and processes for synthesizing the composition.

##STR00001##

In order to provide a novel compound that has good solvent solubility, has high storage stability (dissolution stability) during refrigerated or frozen storage, and can be used as a crosslinking agent, a substituted trisphenol compound represented by formula (2) below is provided: ##STR00001##