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Fragrance and methods for production of 5-epi-β-vetivone, 2-isopropyl-6, 10-dimethyl-spiro[4.5]deca-2,6-dien-8-one, and 2-isopropyl-6, 10-dimethyl-spiro[4.5]deca-1, 6-dien-8-one

US Patent 8642815 · Granted Feb 4, 2014

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