ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Biphenyl Biphenyl ((C6H5)2), a polycyclic aromatic hydrocarbon (PAH), also known as diphenyl or phenylbenzene or 1,1'-biphenyl or lemonene Originally from the CUAHSI HIS VariableNameCV. See: http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=VariableNameCV.