2-Phenoxy-2,2-o-phenylenedioxy-4,5-bis(trifluoromethyl)-2,2-dihydro-1,3,2-dioxaphospholene 53799-42-1 NSC252919 Spiro[1,3,2-benzodioxaphosphole-2,2'-[1,3,2]dioxaphosphole], 2-phenoxy-4',5'-bis(trifluoromethyl)-