InChI=1/C20H23N3O4S/c1-14-4-9-19(15(2)21-14)20(25)22-10-12-23(13-11-22)28(26,27)18-7-5-17(6-8-18)16(3)24/h4-9H,10-13H2,1-3H3 26836E18DD81AEC3