Drugs Containing Essential Oils Aetherolea , Balsams and Oleo-Gum-Resins

Essential oils are volatile, odorous principles consisting of terpene alcohols, aldehydes, ketones and esters ( 90%) and/or phenylpropane derivatives. Aetherolea are soluble in ethanol, but only to a very limited extent in water. They are mostly obtained by steam distillation of plant material. [Pg.149]

Balaams, e.g. toln balsam, are exudates obtained by incision into stem, or trunks of plants or trees, respectively. They are water-insoluble resinous solids or viscous liquids with an aromatic odour, their constituents being 40%-60% of balsamic esters. [Pg.149]

The oleo-gura-resin myrrh contains resin.s, gums and 7%-17% of volatile oil and i,s about 50% water. soluble. [Pg.149]

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