InChI=1/C11H12O4/c1-15-10-4-2-8(3-5-11(13)14)6-9(10)7-12/h2-6,12H,7H2,1H3,(H,13,14)/p-1/b5-3+/fC11H11O4/q-1 13A3C38AE638D58B