InChI=1S/C15H20O5/c1-14(2)12(17)6-7-15(3,20-14)10-5-4-9(13(18)19)8-11(10)16/h4-5,8,12,16-17H,6-7H2,1-3H3,(H,18,19)/t12-,15+/m0/s1