InChI=1S/C16H25N3O8S/c17-11(16(26)27)3-4-13(22)19-12(15(25)18-8-14(23)24)9-28-10(5-7-21)2-1-6-20/h1-2,7,10-12,20H,3-6,8-9,17H2,(H,18,25)(H,19,22)(H,23,24)(H,26,27)/b2-1+