InChI=1/C16H16O5/c1-16(2,15(18)19)21-9-6-7-11-10-4-3-5-12(10)14(17)20-13(11)8-9/h6-8H,3-5H2,1-2H3,(H,18,19)/p-1/fC16H15O5/q-1 97F33DB80DE4E125