InChI=1S/C20H41O9P/c1-2-3-4-5-6-7-8-9-10-11-12-13-20(24)27-15-19(23)17-29-30(25,26)28-16-18(22)14-21/h18-19,21-23H,2-17H2,1H3,(H,25,26)/p-1