Fosphenytoin sodium92134-98-0100 % similar Disodium phenyl phosphate3279-54-737 % similar 1(3H)-Isobenzofuranone, 3,3-bis[4-(phosphonooxy)phenyl]-, sodium salt (1:4)68807-90-935 % similar Phenytoin sodium630-93-333 % similar 1-Naphthyl disodium orthophosphate2183-17-731 % similar