InChI=1/C21H24BrFN2O2/c1-3-20-10-12(18(26)27-2)17-21(13-6-4-5-7-15(13)24-17)8-9-25(19(20)21)11-14(23)16(20)22/h4-7,14,16,19,24H,3,8-11H2,1-2H aspidospermidine-3-carboxylic acid, 6-bromo-2,3-didehydro-7-fluoro-, methyl ester methyl 6-bromo-7-fluoro-2,3-didehydroaspidospermidine-3-carboxylate