Morphine is the structure chiefly responsible for the biological activity of opium. What is the name given to the chemical that is chiefly responsible for the biological activity of a natural extract?

Lead compound

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Active principle

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Pharmacophore

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Lead principle

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Solution

The correct option is B Active principle
An active ingredient(AI) is the ingredient in a pharmaceutical drug or pesticide that is biologically active. The similar terms active pharmaceutical ingredient(API) and bulk active substance may be used for natural products.

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