丙烯酸叔丁酯

propyl (S)-4-ethyl-3,4,7,8-tetrahydro-4-hydroxy-3,8-dioxo-1H-pyrano[3,4-c] pyridine-6-carboxylate

柠嗪酸

2,6-二氯异烟酸

1-(2,6-Dichloro-pyridin-4-yl)-propan-1-one