InChI=1S/C17H22O6/c1-9-10(2)15(16(20)21)23-17(11(9)3)22-13-7-5-4-6-12(13)8-14(18)19/h4-7,9-11,15,17H,8H2,1-3H3,(H,18,19)(H,20,21)/t9-,10?,11?,15-,17+/m0/s1