InChI=1/C20H19N3O4S/c1-27-18-10-8-16(9-11-18)22-28(25,26)19-7-5-6-17(14-19)21-20(24)15-23-12-3-2-4-13-23/h2-14,22H,15H2,1H3/p+1/fC20H20N3O4S/h21H/q+1 37B5DD762377A3DC