InChI=1S/C16H22O4/c1-9(2)5-6-10-14(19)12(17)7-11-13(18)8-16(3,4)20-15(10)11/h5-6,12,14,17,19H,7-8H2,1-4H3/b10-6-/t12-,14+/m0/s1