InChI=1S/C18H18ClNO4S/c1-11(21)20-16(18(23)24)10-25-17(12-2-6-14(19)7-3-12)13-4-8-15(22)9-5-13/h2-9,16-17,22H,10H2,1H3,(H,20,21)(H,23,24)/t16?,17-/m0/s1