Ximoprofen is a novel anti-inflammatory compound for the study of spondylitis.

Pyrimidines are heterocyclic six-membered nitrogen-containing carbon ring structures with uracil cytosine and thymine being the basal structures of ribose-containing nucleosides (uridine cytidine and thymidine respectively) or deoxyribose-containing deoxynucleosides and their corresponding ribonucleotides or deoxyribonucleotides.

16alpha-Hydroxydehydrotrametenolic acid is a natural product.