LDRUG The Derwent Drug (DRUGU) Learning file Database Producer Clarivate Analytics Description Learning File to the DRUG files 172.77 KB Download: LDRUG (PDF) Database Summary Sheet: Concise description with all fields, all formats, many examples. 669.35 KB Download: Usage terms (PDF) In addition to the STN General Terms & Conditions, please find the file-specific Usage Terms here. Cluster Learning Features CAS RN Structure Search Subjects Life Sciences, Pharmacology & Medicine