InChI=1S/C19H24O4/c1-5-11(2)8-12(3)6-7-15-9-14-10-16(20)13(4)18(21)17(14)19(22)23-15/h6-11,19-22H,5H2,1-4H3/b7-6+,12-8+/t11-,19+/m0/s1