5-bromopyrazolo[1,5-a]pyridine
5-bromopyrazolo[1,5-a]pyridine-3-carbaldehyde
N'-((5-bromopyrazolo[1,5-a]pyridin-3-yl)methylene)-N,2-dimethyl-5-nitrobenzenesulfonohydrazide
N'-((5-cyclopropylpyrazolo[1,5-a]pyridin-3-yl)methylene)-N,2-dimethyl-5-nitrobenzenesulfonohydrazide
N,2-dimethyl-5-nitro-N'-((5-vinylpyrazolo[1,5-a]pyridin-3-yl)methylene)benzenesulfonohydrazide