3-(Tetrahydro-2-oxo-3-furanyl)propionic acid 3-Furanpropanoic acid, tetrahydro-2-oxo- 5-18-08-00018 (Beilstein Handbook Reference) 936-83-4 BRN 0130578 Tetrahydro-2-oxo-3-furanpropanoic acid