InChI=1/C17H22O6/c1-2-12-10-23-17(21)9-13(12)8-16(20)22-6-5-11-3-4-14(18)15(19)7-11/h2-4,7,13,17-19,21H,5-6,8-10H2,1H3/b12-2+