9-hydroxy-4-methoxy-1H-triazino<3,4-e>purine

1-Methoxy-2,5-diphenylarsol

7-deoxy-7-epi-7-(5-(4-fluoro-5-methoxy-2-nitrophenyl)-1,3,4-thiadiazol-2-ylthio)-lincomycin

methyl N-(2-bromo-3-nitrophenyl)carbamate