InChI=1/C15H20N2O3S/c1-10(2)8-16-15(20)12-4-6-13(7-5-12)17-14(19)9-21-11(3)18/h4-7,10H,8-9H2,1-3H3,(H,16,20)(H,17,19 S-[2-({4-[(isobutylamino)carbonyl]phenyl}amino)-2-oxoethyl] ethanethioate ethanethioic acid, S-[2-[[4-[[(2-methylpropyl)amino]carbonyl]phenyl]amino]-2-oxoethyl] ester