FDMT-5'-Fluorescein CEP is a variation of N,N-Bis(1-methylethyl)phosphoramidous Acid 2-Cyanoethyl 6-[[(4-Methoxyphenyl)diphenylmethyl]amino]hexyl Ester (B451470) for fluorous affinity purification purpose which is can be used to prepare branched compounds for use in nucleic acid detection and analysis reactions as well as synthesis.