InChI=1S/C19H26O5/c1-13(2)4-3-5-14(12-20)6-9-16-15(8-11-18(22)23)7-10-17(21)19(16)24/h4,6-7,10,20-21,24H,3,5,8-9,11-12H2,1-2H3,(H,22,23)/b14-6-