1,3,2-Benzodioxastibole, 2-hydroxy- 6295-12-1 NSC11806 Pyrocatechol, cyclic ester with antimonic acid (H3SbO3) WLN: T66 BO-SB-O EHJ CQ o-Phenylene antimonate(III) o-Phenylene antimonate(III), (C6H4O2)(HO)Sb