3-Oxo-1-phenyl-d5-3-(2’-hydroxy-5-benzyloxyphenyl)propene is the labeled analogue of 3-Oxo-1-phenyl-3-(2’-hydroxy-5-benzyloxyphenyl)propene (O870100), a potential inhibitor of HIV-1 integrase (IN) and human LEDGF/p75, which represents a novel target for anti-HIV therapy.