methyl 4-ethyl-8-oxo-7-(prop-2-ynyl)-7,8-dihydro-1H-pyrano[3,4-c]pyridine-6-carboxylate

4-ethyl-8-oxo-7-(prop-2-ynyl)-7,8-dihydro-1H-pyrano[3,4-c]pyridine-6-carboxylic acid

4-ethyl-8-oxo-N-phenyl-7-(prop-2-ynyl)-7,8-dihydro-1H-pyrano[3,4-c]pyridine-6-carboxamide

4-ethyl-6-chloro-8-methoxy-1H-pyrano[3,4-c]pyridine

2-氯喹啉