InChI=1S/C19H32O8/c1-10(21)5-6-19-17(2,3)7-11(8-18(19,4)27-19)25-16-15(24)14(23)13(22)12(9-20)26-16/h5-6,10-16,20-24H,7-9H2,1-4H3/b6-5+