(.ALPHA.R,.ALPHA.'S,2S,2'S)-.ALPHA.,.ALPHA.'-(IMINOBIS(METHYLENE))BIS(6-FLUORO-3,4-DIHYDRO-2H-1-BENZOPYRAN-2-METHANOL)
(.alpha.r,.alpha.'s,2s,2's)-.alpha.,.alpha.'-(iminobis(methylene))bis(6-fluoro-3,4-dihydro-2h-1-benzopyran-2-methanol)