描述:
1-Cyclopropyl-1,4-dihydro-6,7-difluoro-8-fluoromethoxy-4-oxo-quinoline-3-carboxylic acid difluoroboryl ester 、 1-Cyclopropyl-1,4-dihydro-6,7-difluoro-8-methoxy-5-methyl-4-oxo-quinoline carboxylic acid 以Compound 454 was obtained as a white powder (99%)的产率得到1-cyclopropyl-6,7-difluoro-8-methoxy-5-methyl-4-oxo-1,4-dihydro-quinoline-3-carboxylic acid boron difluoride