Pyridinium, 1-methyl-4-[(methylphenylhydrazono)methyl]-, methyl sulfate
Pyridinium, 3-carboxy-1-(phenylmethyl)-, inner salt
Pyridinium, 4-[2-[4-[ethyl(phenylmethyl)amino]phenyl]ethenyl]-1-(2-hydroxyethyl)-, chloride (1:1)
Pyrido(2,3-b)pyrazine-2,3-diol
Pyrimidine, 2,4-dichloro-5-methyl-
Pyrimidine, 2,4-dichloro-6-methyl-