InChI=1S/C15H22O4/c1-7(2)9-6-15(4)8(3)12(17)14(19)13(18)10(15)5-11(9)16/h5,8,12-14,17-19H,6H2,1-4H3/t8-,12+,13+,14+,15+/m0/s1