Pyrene has been tentatively identified in the interstellar medium. Use Huckel Rule to determine is pyrene is aromatic or antiaromatic (assuming planarity of the π system). 
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Article 2
Refers to a particular segment of a legal code or document, which could vary significantly by context, often involved in discussing commercial transactions in the U.S. Uniform Commercial Code.
United Nations Convention
An international treaty adopted under the auspices of the United Nations, on various global issues ranging from human rights to environmental protection.
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Transactions involving the sale of goods between parties located in different countries.
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The United Nations Convention on Contracts for the International Sale of Goods, a treaty that provides a uniform framework for international commerce.
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