InChI=1S/C17H22O5/c1-9-7-14-12(10(2)16(19)21-14)8-15-17(4,22-15)6-5-13(9)20-11(3)18/h12-15H,1-2,5-8H2,3-4H3/t12-,13-,14+,15-,17+/m1/s1