ethyl 7,6-difluoro-4-hydroxy-2-mercaptoquinoline-3-carboxylate

ethyl 6,7-difluoro-4-hydroxy-2-[(methoxymethyl)thio]-quinoline-3-carboxylate

diethyl 2-(3-(3,4-difluorophenyl)-4-methyl-1,3-thiazetidin-2-ylidene)malonate

diethyl[[(3,4-difluorophenyl)amino][(methoxymethyl)-thio]methylene]malonate