ODM2 Variable Name Controlled Vocabulary ODM2 Working Group A vocabulary for describing the name of Variables. Benzo(g,h,i)perylene Benzo(g,h,i)perylene (C22H12), a polycyclic aromatic hydrocarbon (PAH) Originally from the CUAHSI HIS VariableNameCV. See: http://his.cuahsi.org/mastercvreg/edit_cv11.aspx?tbl=VariableNameCV.