3,4,4a,5,6,7-hexahydro-2H-cyclopenta[b]pyridine

乙酸酐

1-(1-吡咯烷)环戊烯

1,3,4,5,6,7-hexahydrocyclopenta[b]pyridin-2-one

1,3,4,5,6,7-hexahydro-2H-cyclopenta[b]pyridine-2-thione