http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Trình bày khái quát về từng nhóm thuốc, nêu lên mối liên quan giữa cấu trúc hoá học và tác dụng dược lý của từng nhóm thuốc: thuốc ảnh hưởng chức năng dạ dày - ruột, thuốc sát trùng, kháng sinh..