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 Level 4
 
 A - Alimentary tract and metabolismA03 - Drugs for functional gastrointestinal disordersA03A - Drugs for functional bowel disordersA03AD - Papaverine and derivatives
 
 A03AD01 - PapaverineA03AD02 - DrotaverineA03AD30 - MoxaverineA03AD51 - Papaverine, combinations
 
 
 
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