Wagner, Frank Technical Center, Celanese Chemical Company, Corpus Christi, Texas.
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An alkaloid, C17H23NO3, with the chemical structure below. The systematic chemical name is endo(±)- α-(hydroxymethyl)phenylacetic acid 8-methyl-8-azabicyclo[3.2.1]oct-3-yl ester, and in phamacy it is sometimes known as dl-hyoscyamine. It occurs in minute amounts in the leaves of Atropa belladonna, A. betica, Datura stramonium, D. innoxia, and D. sanguinea as well as many related plants. It is chiefly manufactured by racemization of l-hyoscyamine, which is isolated from the leaves and stems of the henbane, Hyoscyamus niger. It melts at 114–116°C (237–241°F) and is poorly soluble in water. The nitrate and sulfate are used in medicine instead of the free base.
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