InChI=1S/C17H20O5/c1-7-10-5-11-8(2)13-14(22-13)15(20-9(3)18)17(11,4)6-12(10)21-16(7)19/h10-15H,1-2,5-6H2,3-4H3/t10-,11+,12-,13+,14+,15+,17-/m1/s1