carbonic acid-(4-nitro-phenyl ester)-trichloromethyl ester

4-phenyl-5-phenylimino-1,2,4-dithiazolidin-3-one

guanidine-N,N'-dicarboxylic acid dianilide

N-hydroxy-N'-phenyl-oxalamide

2,4,6-triphenyl-1,3,5-triazine 1,3,5-trioxide