InChI=1S/C15H28O4/c1-11(2)6-5-8-14(3,17)12-7-9-15(4,18)13(10-16)19-12/h6,12-13,16-18H,5,7-10H2,1-4H3/t12-,13+,14-,15+/m1/s1