InChI=1S/C15H20O5/c1-14(9-16)6-3-7-15(2,20-14)11-5-4-10(13(18)19)8-12(11)17/h4-5,8,16-17H,3,6-7,9H2,1-2H3,(H,18,19)/t14-,15+/m1/s1