Synonyms: CORTISOL-9,11,12,12-D4;HYDROCORTISONE (9,11,12,12-D4);17-Hydroxycorticosterone-9,11,12,12-d4, Cortisol-9,11,12,12-d4, Hydrocortisone-9,11,12,12-d4, Kendall’s compound F (9,11,12,12-d4), Reichstein’s substance M (9,11,12,12-d4), 4-Pregnene-11β,17α,21-triol-3,20-dione-d4 (9,11,12,12-d4), 11β,17α,21-Trihydroxypregn-4-ene-3,20-dione-d4 (9,11,12,12-d4)