| http://www.w3.org/ns/prov#value | - The process of claim 31 wherein said ester reaction product has the structure: ##STR17## wherein R4 is selected from the group consisting of hydrogen, halogen, hydroxyl, C1 to C8 alkyl and C1 to C8 alkoxy, R5 is a direct bond or a C1 to C20 organic radical, R6 is hydrogen or a C1 to C20 organic radical which may form with R7 part of a 5 or 6 carbon atom cyclic ring structure, R7 is CH2 R8 wherein
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