propyl 4-(1,2-dihydroxybutan-2-yl)-6-methoxy-5-(phenylmethoxymethyl)pyridine-2-carboxylate

2-苄氧基-6-氯-异烟酸

tert-butyl (4S)-4-ethyl-4,6-dihydroxy-3,10-dioxo-1,8-dihydropyrano[3,4-f]indolizine-7-carboxylate

propyl (4S)-4-ethyl-3,4-dihydroxy-8-methoxy-1,3-dihydropyrano[3,4-c]pyridine-6-carboxylate

7-乙基-10-羟基喜树碱