6385-60-0 66330-88-9 7-Oxabicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic acid, disodium salt, (endo)- Aquathol disodium Disodium (endo,endo)-7-oxabicyclo(2.2.1)hept-5-ene-2,3-dicarboxylate EINECS 228-984-9