Source:http://linkedlifedata.com/resource/umls/id/C0040087
CSP: 2,4-diketo-5-methylpyrimidine; one of the 5 major bases (with adenine, guanine, cytosine, and uracil) found in nucleic acids.,NCI: A chemical compound that is used to make one of the building blocks of DNA. It is a type of pyrimidine.