InChI=1S/C11H13NO4/c1-2-6-7-3-5(13)4-12-8(7)10(9(6)14)16-11(12)15/h2-3,5,8-10,13-14H,4H2,1H3/b6-2-/t5-,8+,9+,10+/m1/s1