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Boron trifluoride etherate is the chemical compound with the formula BF3O(C2H5)2, often abbreviated BF3OEt2.
B 1978 (OTTO) Boron trifluoride diethyl etherate - used in the preparation of cyclopentyl- and cycloheptyl[b]indoles from aryl cyclopropyl ketones via [3+2] cycloaddition.