3-Chloro-2-methyl-5h-cyclopenta[b]pyridin-7(6h)-one
3-Bromo-6,7-dihydro-5h-cyclopenta[b]pyridin-7-ol
3-Bromo-6,7-dihydro-5h-cyclopenta[b]pyridin-7-amine
3-Bromo-5-cyclopropyl-4-methylpyridine
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