InChI=1S/C22H24O5/c1-14(2)6-5-7-15(3)10-12-25-19-16-8-9-18(23)27-21(16)22(24-4)20-17(19)11-13-26-20/h6,8-11,13H,5,7,12H2,1-4H3/b15-10+