InChI=1S/C21H29N3O3S/c1-21(10-5-12-24(21)2)11-13-28(26,27)23-20(25)22-19-17-8-3-6-15(17)14-16-7-4-9-18(16)19/h11,13-14H,3-10,12H2,1-2H3,(H2,22,23,25)/b13-11+/t21-/m1/s1