1,4-Naphthalenediol, 6-(astato-211At)-2-methyl-, bis(dihydrogen phosphate), tetrasodium salt 81781-58-0 Astato-2-methyl-1,4-naphthoquinol bis(disodium phosphate) Astato-2-methyl-1,4-naphthoquinol diphosphate At-Mnqdp