InChI=1S/C19H32O7/c1-10-7-12(21)8-19(3,4)13(10)6-5-11(2)25-18-17(24)16(23)15(22)14(9-20)26-18/h5-6,10-11,13-18,20,22-24H,7-9H2,1-4H3/b6-5+