tokens: For the forward reaction , eqn. ( 1 ) gave 45 = 84 - 39 ( dexamethasone ) and 46 = 60 - 14 ( cortisol ) at 0 degree C , and 44 = 24 + 20 ( dexamethasone ) and 46 = 28 + 18 ( cortisol ) at 25 degrees C .