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was added, and after 2 h the white Mannich-base precipitate was collected by filtration and washed with water. This solid was dissolved in dimethylformamide to induce decarboxylation and stirred for 1 h. The solvent was then evaporated under reduced pressure, and the resulting oil was dissolved in ethyl acetate and washed with 20% citric acid, water, and saturated sodium chloride. The organic layer was dried over magnesium sulfate, filtered, and evaporated to an oil. Crystallization from diethyl ether/hexane afforded pure 7: 0.032 g (23%); mp 105-108 °C; [apD -34.7°( c

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