InChI=1S/C17H20NO4P/c1-13(16-6-4-3-5-7-16)22-23(20,21)12-15-8-10-17(11-9-15)18-14(2)19/h3-11,13H,12H2,1-2H3,(H,18,19)(H,20,21)/p-1/t13-/m0/s1