InChI=1S/C21H27N2O7P/c1-14(2)19(23-21(26)29-13-15-7-4-3-5-8-15)31(27,28)30-18(20(24)25)17-10-6-9-16(11-17)12-22/h3-11,14,18-19H,12-13,22H2,1-2H3,(H,23,26)(H,24,25)(H,27,28)/t18-,19+/m0/s1