吉西他濱中間體T3;(3R,S)-2,2-二氟-3-羥基-3-(2,2-二甲基二氧環(huán)戊-4-基)丙酸乙酯;(3R,S)-2,2-二氟-3-羥基-(2,2-二甲基二氧環(huán)戊-4-基)丙酸乙酯;(R)-3-((R)-2,2-二甲基-1,3-二氧五環(huán)-4-基)-2,2-二氟-3-羥基-丙酸乙酯;乙基-3-(2,2-二甲基-1,3-二氧戊烷-4-基)-2,2-二氟-3-羥基丙酸;

ethyl (3R,4R)-3-(2,2-dimethyl-1,3-dioxolan-4-yl)-2,2-difluoro-3-hydroxypropanoate;Ethyl(3RS)-2,2-Difluoro-3-(2,2-Dimethylioxolan-4-yl)Propionate;Ethyl(3R,S)-2,2-difluoro-3-hydroxy-3-(2,2-dimethyldioxolan-4-yl)propionate;ethyl (R)-2,2-difluoro-3-hydroxy-3-((R)-2,2-dimethyl-[1,3]dioxoran-4-yl)propionate;ethyl 2,2-difluoro-3-hydroxy-3-(2,2-dimethyl-[1,3]dioxolan-4-yl)propionate;