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Level 4
A - Alimentary Tract and Metabolism
A03 - Drugs for Functional Gastrointestinal Disorders
A03B - Belladonna and Derivatives, Plain
A03BA - Belladonna alkaloids, tertiary amines
A03BA01 - Atropine
A03BA03 - Hyoscyamine
A03BA04 - Belladonna Total Alkaloids
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