| http://www.w3.org/ns/prov#value | - The synthesis involves the reaction of a monomeric ortho ester having the general formula ##STR6## wherein R is a hydrogen or an alkyl of 1 to 10 carbon atoms and the R' are independently selected from lower alkyl, with a triol having the general formula ##STR7## wherein n is an integer in the range of 1 to 5 inclusive, preferably 1 to 3.
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