tokens: Two human lymphoblast cell lines , LICR-LON-HMy2 ( HMy2 cells ) and GM4672A cells , are moderately growth inhibited by dexamethasone ( 1 , 4-pregnadien-9-fluoro-16 alpha-methyl-11 beta , 17 alpha , 21-triol-3 , 20-dione ) ( Dex ) .