(3Z)-3-butylidene-4-hydroxy-2-benzofuran-1(3H)-one 1(3H)-isobenzofuranone, 3-butylidene-4-hydroxy-, (3Z)- InChI=1/C12H12O3/c1-2-3-7-10-11-8(12(14)15-10)5-4-6-9(11)13/h4-7,13H,2-3H2,1H3/b10-7