The active principle of Salvia divinorum, salvinorin A, is derived from the leaves of the plant. Chemically, salvinorin A is a neoclerodane diterpene, one of a group of nitrogen-containing terpene compounds that have psychotropic properties. Two other such compounds are tetrahydrocannabinol and absinthe. Purified salvinorin A can be obtained from an ether extract of the leaves, which is then concentrated by chromatography and repeated crystallization.

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