InChI=1S/C19H22O7/c1-3-14-15(16(18(22)24-2)11-26-19(14)23)10-17(21)25-9-8-12-4-6-13(20)7-5-12/h3-7,11,15,19-20,23H,8-10H2,1-2H3/b14-3+/t15-,19+/m0/s1