| http://www.w3.org/ns/prov#value | - A method of protecting the anhydride is to esterify it with an alcohol or polyol to form the mono-ester acid and its derivatives, as follows: ##STR1## Butyl carbitol, methanol, ethylene glycol, glycerol, meso-erythritol, adonitol, and sorbitol are some examples of esterifying alcohols and polyols which can be employed.
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