InChI=1S/C19H26O4/c1-13(2)5-4-6-14(3)7-8-15-11-16(9-10-19(22)23)18(21)12-17(15)20/h5,7,11-12,20-21H,4,6,8-10H2,1-3H3,(H,22,23)