(S)-7-((2-bromoquinolin-3-yl)methyl)-4-ethyl-4-hydroxy-1,7-dihydro-3H-pyrano[3,4-c]pyridine-3,8(4H)-dione

4-ethyl-1,12-dihydro-14H-pyrano[3',4':6,7indolizino[1,2-b]]quinolin-14-one

phenyl isocyanate

(S)-4-Ethyl-4-hydroxy-6-iodo-3-oxo-7-propargyl-1H-pyrano[3,4-c]-8-pyridone