InChI=1S/C21H26O4/c1-13(11-20(22)23)7-8-19-21(5,25-19)10-9-17-14(2)12-18(24-6)16(4)15(17)3/h7-12,19H,1-6H3,(H,22,23)/b8-7+,10-9+,13-11-