3-benzofurancarboxylic acid, 4-acetyl-5-(acetyloxy)-2-methyl-, ethyl ester InChI=1/C16H16O6/c1-5-20-16(19)14-9(3)21-12-7-6-11(22-10(4)18)13(8(2)17)15(12)14/h6-7H,5H2,1-4H ethyl 4-acetyl-5-(acetyloxy)-2-methyl-1-benzofuran-3-carboxylate