Source:http://linkedlifedata.com/resource/umls/id/C0018321
CSP: 2-amino-6-hydroxypurine; one of the 5 major bases (with adenine, thymine, cytosine, and uracil) found in nucleic acids.,NCI: A chemical compound that is used to make one of the building blocks of DNA and RNA. It is a type of purine.,NCI: A purine base that is a constituent of nucleotides occuring in nucleic acids.