InChI=1S/C20H21NO4.H2O4S/c1-22-17-6-5-13(10-18(17)23-2)9-16-15-12-20(25-4)19(24-3)11-14(15)7-8-21-16;1-5(2,3)4/h5-8,10-12H,9H2,1-4H3;(H2,1,2,3,4)