berberine c20h18no4, herbal alkaloid molecule. structural chemical formula on the dark blue background

alkaloid ammonium antidepressant antidiarrheal antimicrobial atom atomic barberry berberin berberine berberis blue carbon chemical chemistry cholesterol compound dark dipeptidyl dpp4 drug education flat formula fungal herbal hydrogen icon illustration infection isoquinoline medicine molecular molecule nitrogen organic oxygen parasitic peptidase quaternary science structural structure study toxic vector white