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When heated with baryta-water or hydrochloric acid, it takes up a molecule of water and is split into tropine, C H NO, and tropic acid, C H O . This latter is phenyl-oxypropionic acid. Tropine, when heated to 180°C. with concentrated hydrochloric acid, splits off a molecule of water, and yields tropidine, C H N, a liquid base, with an odor resembling conine.
When this tropidine is heated with an excess of bromine, it yields dibrompyridine. Piperine, the alkaloid of pepper, has also been well studied.
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