InChI=1S/C15H26O4/c1-13(2)5-4-6-14(3)12(13)11(18)7-10(8-16)15(14,19)9-17/h7,11-12,16-19H,4-6,8-9H2,1-3H3/t11-,12-,14-,15+/m0/s1