2-Oxa-6-azaspiro[3.3]heptane hemioxalate1045709-32-761 % similar 2-Oxa-6-azaspiro[3,3]heptane oxalic acid salt1159599-99-161 % similar Dipentaerythritol126-58-940 % similar Bis(3-ethyl-3-oxetanylmethyl) ether18934-00-440 % similar 3,3-Bis(bromomethyl)oxetane2402-83-740 % similar 3,3-Bis(chloromethyl)oxetane78-71-740 % similar Oxt 1013047-32-332 % similar 1,1′-Oxybis[2,2,2-trifluoroethane]333-36-830 % similar 2,2,2-Trifluoro-N-(2,2,2-trifluoroethyl)ethanamine407-01-230 % similar