Isophthaloyl chloride was used as a starting material in a synthesis of the following polymer.What
was the structure of its coupling partner X? 
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The price at which the quantity of a good or service demanded by consumers equals the quantity supplied by producers, leading to a stable market condition.
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The income that is gained by governments through taxation of individuals and businesses.
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The set of laws and regulations that govern how taxes are collected, managed, and utilized by the government.
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