(5-Butyl-3-oxo-2,3-dihydro-furan-2-yl)-acetic acid (5-Butyl-3-oxo-2,3-dihydrofuran-2-yl)-acetic acid (5-butyl-3-oxo-2,3-dihydrofuran-2-yl)acetic acid 2-furanacetic acid, 5-butyl-2,3-dihydro-3-oxo- InChI=1/C10H14O4/c1-2-3-4-7-5-8(11)9(14-7)6-10(12)13/h5,9H,2-4,6H2,1H3,(H,12,13