InChI=1S/C16H24O4/c1-11-5-3-2-4-6-12-13(7-8-14(12)17)15(18)9-10-16(19)20-11/h4,6,9-15,17-18H,2-3,5,7-8H2,1H3/b6-4+,10-9+/t11-,12+,13-,14-,15+/m1/s1