InChI=1S/C17H22O5/c1-11(2)4-3-5-12(10-18)6-7-13-8-14(17(21)22)16(20)9-15(13)19/h4,6,8-9,18-20H,3,5,7,10H2,1-2H3,(H,21,22)/b12-6-