2-chloro-5-(hydrazinylmethyl)pyridine
TPTU O-(1,2-dihydro-2-oxo-pyridyl)- -1,1,3,3-tetraMethyluroniuM tetrafluoroborate
Ethyl 2-(4-broMopyridin-2-yl)acetate
3,5-Dichloro-4-pyridone-N-acetic acid
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