InChI=1/C20H23O11P/c21-13-7-12(8-14(22)9-13)2-1-11-3-5-15(6-4-11)30-20-19(25)18(24)17(23)16(31-20)10-29-32(26,27)28/h1-9,16-25H,10H2,(H2,26,27,28)/b2-1+