InChI=1S/C14H19NO4/c1-3-8(7-16)12-9-5-4-6-10(19-2)11(9)13(15-12)14(17)18/h3,7,9-10,12,15H,4-6H2,1-2H3,(H,17,18)/b8-3-/t9-,10-,12-/m0/s1