1-β-D-Ribofuranosyl-3-iminohydroxymethyl Guandinine is an impurity of Azacytidine. Azacytidine is a chemical analog of Cytidine which is a nucleoside in DNA and RNA.

Carbidopa is a noncompetitive inhibitor of aromatic-L-amino-acid decarboxylase (DOPA Decarboxylase) which is an enzyme used in the biosynthesis of L-tryptophan to serotonin and L-DOPA to dopamine.

Carbimazole is a prodrug of its active form Methimazole (Thiamazole), which works by preventing thyroid peroxidase enzyme from coupling and iodinating the tyrosine residues on thyroglobulin, and hence reduces the production of thyroxines.

Aspirin or Acetylsalicylic Acid is an acetyl derivative of Salicylic acid and it is used in the treatment of fever, pain, rheumatic fever, and inflammatory diseases, such as rheumatoid arthritis, pericarditis, and Kawasaki disease.

One of the best-selling statin drugs is SIMVASTATIN, which is marketed under the trade name of Zocor and was developed by Merck.