Pyrrolo[3,4-b]pyridines
Pyrrolo[3,4-d] [2] benzazepines
Pyrrolo[3,4-d]pyrimidines and methods for their preparation
Pyrrolo[3,4-d][2]benzazepines
Pyrrolo[3,4-d][2]benzazepines
Pyrrolo[3,4-d][2]benzazepinones
Pyrrolyl compounds and processes for their manufacture
Pyrrolyl oxyphenyl ketones
Pyrrylfluoran compounds
Pyrrylmethylthio flavoring agents
Pyrylium dyes having a fused rigidized nitrogen-containing ring
Pyrylium dyes having a fused, rigidized nitrogen-containing ring