1,3,2-Benzodioxaphosphole, 2-(1-naphthyloxy)- 2-(1-Naftyloxy)-1,3,2-dioxafosfaindan [Czech] 2-(1-Naphthyloxy)-1,3,2-dioxaphosphaindan DF4366000 Phosphorous acid, cyclic o-phenylene 1-naphthyl ester alpha-Naftolfosfit [Czech] alpha-Naphthol phosphite