InChI=1S/C19H24O5/c1-13(2)4-3-5-14(12-20)6-7-15-10-16(8-9-19(23)24)18(22)11-17(15)21/h4,6,8-11,20-22H,3,5,7,12H2,1-2H3,(H,23,24)/b9-8?,14-6-