InChI=1/C20H41O4P/c1-17(2)9-6-10-18(3)11-7-12-19(4)13-8-14-20(5)15-16-24-25(21,22)23/h15,17-19H,6-14,16H2,1-5H3,(H2,21,22,23)/p-2