LMARPAT The CAS Patent Markush Learning file Database Producer Chemical Abstracts Service (CAS) Description Learning File to MARPAT 309.1 KB Download: LMARPAT (PDF) Database Summary Sheet: Concise description with all fields, all formats, many examples. 699.11 KB Download: Usage terms (PDF) In addition to the STN General Terms & Conditions, please find the file-specific Usage Terms here. Cluster Learning Features FSORT Images Structure Search Subjects Chemistry Patents